diffusionx 0.8.0

# Changelog

All notable changes to this project will be documented in this file.

## [0.7.0] - 2025-11-25

### 🚜 Refactor

- Move native CPU optimization to build config
- Centralize parameter validation in `simulate` and `displacement` methods
- Optimize Langevin and OU process simulations with direct implementation and batch RNG
- Rename `sigma` to `scale` in continuous processes

### 📚 Documentation

- Update README examples for API changes and feature gates

### ⚙️ Miscellaneous Tasks

- Bump version to 0.7.0

## [0.6.3] - 2025-11-19

### 🐛 Bug Fixes

- Fix final step displacement in Brownian motion

### ⚙️ Miscellaneous Tasks

- Bump version to 0.6.3

## [0.6.2] - 2025-11-19

### 🚜 Refactor

- Optimize Langevin simulations with on-demand RNG and FMA
- Remove GPU infrastructure
- Parallelize displacement calculations for multiple processes

### 📚 Documentation

- Fix subordinated Langevin macro docs

### ⚙️ Miscellaneous Tasks

- Bump version to 0.6.2

## [0.6.0] - 2025-11-17

### 🚜 Refactor

- Add input validation and optimize displacement calculation for continuous processes
- Optimize time series generation in continuous process simulations
- Optimize displacement calculation in generalized Langevin equation
- Remove unused docs.rs metadata configuration from `Cargo.toml`
- Add input validation and optimize displacement calculation for discrete and point processes
- Add `start()` and `end()` methods to `ContinuousProcess` trait and implement inverse process calculations
- Add `start()` and `end()` methods to `DiscreteProcess` and `PointProcess` traits
- Simplify parallel moment calculations and improve error handling across all process types

### 📚 Documentation

- Add changelog entries for versions 0.5.0 and 0.4.15
- Update README examples with installation instructions and code improvements
- Update README examples to include required `start()` method in `ContinuousProcess` trait implementations

### ⚙️ Miscellaneous Tasks

- Reorganize `Cargo.toml` structure and exclude GPU-related directories from package
- Bump version from 0.5.0 to 0.6.0

## [0.5.0] - 2025-11-10

### 🚀 Features

- Add benchmarking for Langevin simulation using Criterion

### 💼 Other

- Add langevin-bench example for performance measurement

### 🚜 Refactor

- Simplify iteration over time steps in Langevin and Generalized Langevin simulations
- Streamline imports and improve simulation functions across multiple processes
- Move `docs-header.html` to project root
- Move CUDA and Metal kernel crates into `kernels/` subdirectory

### 📚 Documentation

- Add LaTeX math formatting to stable distribution and stochastic process documentation
- Use absolute GitHub URLs for images in README files
- Use `raw.githubusercontent.com` URLs for SVG images in README files
- Add feature flag requirement note for visualization examples in README files

### ⚙️ Miscellaneous Tasks

- Enable KaTeX rendering in docs and docs.rs config
- Make `visualize` and `io` features optional, bump version to 0.4.16
- Bump version to 0.5.0

## [0.4.15] - 2025-10-28

### 🚀 Features

- *(AI Generated)* Add GPU acceleration with CUDA and Metal backends
- *(AI)* Add GPU Monte Carlo stats kernels CUDA/Metal

### 🐛 Bug Fixes

- Normalize SVG/PNG output paths for plot backends
- Use `mc` instead of `montecarlo`
- Use standard deviation for BM noise sampling
- Fix FBM simulation and Levy direction
- Parallelize MSD/moment sims and validate inputs

### 💼 Other

- Refactor the CUDA and Metal kernels into separate crates.
- Generate scaled normal noise directly

### 🚜 Refactor

- Use realfft instead of rustfft for FFTs
- Enable GPU features and dependencies

### 📚 Documentation

- Set docs.rs target and enable doc cfg attributes
- Disable rustdoc example scraping on docs.rs
- Disable doc.scrape-examples for docs.rs

### ⚙️ Miscellaneous Tasks

- Delete `TODO.md`
- Add rust-version, remove deny.toml, tidy docs
- Update csv dependency to 1.4
- Bump version to 0.4.10 and disable GPU features
- Bump version to 0.4.11 and disable GPU features

## [0.4.9] - 2025-10-10

### 🚜 Refactor

- Use `is_multiple_of` for even check
- Remove unused dead_code allow attribute

### 📚 Documentation

- Update README files to include links for badges

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.4.8
- Update dependencies and clean up Cargo.toml
- Bump gauss-quad dependency to 0.2.4
- Update pre-commit-hooks to v6.0.0 in config
- Bump version to 0.4.9

## [0.4.8] - 2025-07-05

### 💼 Other

- Update version to 0.4.8

### 📚 Documentation

- Update macro usage examples for clarity
- Update README files for improved formatting and clarity

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.4.7

## [0.4.7] - 2025-07-05

### 🚀 Features

- Add Langevin equation macro to simplify the generation of stochastic processes
- Add generalized and subordinated Langevin equation macros
- Add loglog plotting functionality and enhance set_config

### 💼 Other

- Bump version 0.4.6
- Add the example of macro `langevin`
- Update version to 0.4.7

### 🚜 Refactor

- Simplify error messages in parameter validation across various simulation functions

### ⚙️ Miscellaneous Tasks

- Update dependencies and add optional feature

## [0.4.6] - 2025-06-15

### 🐛 Bug Fixes

- Adjust the duration calculation logic to accommodate the maximum duration

### 💼 Other

- Bump version 0.4.6

### 🚜 Refactor

- Optimized the duration calculation logic in the `FirstPassageTime` structure, simplified the process of finding the index using local functions, and improved the readability and maintainability of the code.
- Extracted and optimized the logic for calculating the average and occupied time, simplified the code structure, and improved readability and maintainability.

### ⚙️ Miscellaneous Tasks

- Bump version 0.4.5

## [0.4.5] - 2025-06-11

### 🚀 Features

- Add input parameter validation to enhance the robustness of the simulation function
- Enhanced input parameter validation to improve the robustness of simulation functions
- Enhanced input parameter validation for inverse process simulation function
- Optimize the implementation of continuous/point/jump processes and trajectories, simplify type constraints
- Enhanced input parameter validation for random walk simulation functions
- Enhanced Input Validation for Stochastic Process Simulation Functions

### 💼 Other

- Update version to 0.4.5

### ⚙️ Miscellaneous Tasks

- Update version to 0.4.4

## [0.4.4] - 2025-06-04

### 🚜 Refactor

- Optimize sample aggregation in simulation functions

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.4.3
- Update version to 0.4.4 and add keywords

## [0.4.3] - 2025-05-30

### 🚀 Features

- Add is_increasing function and input validation for interpolation functions

### 🐛 Bug Fixes

- Improve linspace and interpolation functions
- *(functionas.rs)* Enhance linspace function with parallel processing and add diff function
- Fix simulation functions with linspace and error handling

### 💼 Other

- Add Levy Walk simulation example

### 🚜 Refactor

- Rename FBM struct to FBm for consistency

### 📚 Documentation

- *(CIR.rs)* Improve simulation logic with linspace and diff functions
- *(mod.rs)* Add documentation for Brownian yet non-Gaussian process
- *(mod.rs)* Correct spelling of Fractional Brownian motion
- *(README)* Update Chinese and English documentation for Brownian yet non-Gaussian process

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.4.2
- Update version to 0.4.3

## [0.4.2] - 2025-05-28

### 🚀 Features

- *(bng)* Implement Brownian yet non-Gaussian process simulation

### 🐛 Bug Fixes

- *(bm)* Update diffusion_coefficient default value to 0.5

### 🚜 Refactor

- Enhance path generation in Langevin and GeneralizedLangevin simulations

### 📚 Documentation

- Update benchmark references in README files
- Update

### ⚙️ Miscellaneous Tasks

- Update pre-commit configuration and add new hooks
- Update version to 0.4.2 in Cargo.toml

## [0.4.1] - 2025-05-22

### 🚀 Features

- Implement arithmetic operations for Normal distribution
- Enhance Exponential distribution for type flexibility
- Enhance Gamma distribution for type flexibility
- Enhance Normal distribution for type flexibility
- Add LegendPosition enum and integrate with PlotConfig

### 🐛 Bug Fixes

- Validate standard deviation in rands function
- Specify numeric type for standard normal random samples
- *(example)* Specify numeric type for standard normal random samples in CIR.rs

### 🚜 Refactor

- Clean up documentation in simulation module
- Enhance type stability and remove Sized bounds in process traits
- Simplify trait implementations for type stability
- Remove redundant documentation for PointProcess trait implementations
- Update README files for clarity and consistency
- Simplify StandardStable struct by removing Copy trait

### 📚 Documentation

- Correct capitalization in documentation for Fractional Brownian motion
- Remove redundant documentation for ContinuousProcess trait implementations
- Remove redundant documentation comments across multiple files
- Specify numeric type for standard normal random samples

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.4.0
- Add rustfmt configuration for code formatting
- Remove rustfmt configuration file
- Update version to 0.4.1 in Cargo.toml

## [0.4.0] - 2025-05-19

### 🚀 Features

- Implement Lévy walk simulation
- Add linear interpolation and linspace functions
- Implement TAMSD simulation for point processes

### 🚜 Refactor

- Rename `traits.rs` to `basic.rs`
- Refactor simulation traits
- Rename getter methods for consistency
- Refact functional module for stochastic processes
- Update random sampling methods to use u64
- Update process traits to improve type stability
- Enhance type stability in Visualize trait implementations
- Simplify parameter types in simulation methods
- Update random sampling methods to use usize
- Rename methods for consistency and enhance type stability
- Update random sampling methods to improve type stability
- *(example)* Update simulation method signatures for type stability
- Rename Fbm to FBM for consistency
- Update documentation and method signatures for type stability

### 📚 Documentation

- Update documentation for Lévy walk in mod.rs
- Update process documentation with module references

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.13
- Add `.idea` to .gitignore
- Bump version to 0.4.0 in Cargo.toml

## [0.3.13] - 2025-05-15

### 🚀 Features

- Rename module `jump` to `point`,  change `LevyWalk` into `point`

### 💼 Other

- Update CTRW module import from `jump` to `point`

### 🚜 Refactor

- Update TAMSD struct to use generic process type
- Remove optional CSV feature and clean up error handling
- Update PlotConfig to include stairs option and simplify trajectory handling

### ⚙️ Miscellaneous Tasks

- Bump version to 0.3.13 in Cargo.toml

## [0.3.12] - 2025-05-12

### 🐛 Bug Fixes

- Update error handling in ensure_output_dir function

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.11
- Bump version to 0.3.12 in Cargo.toml
- Update CHANGELOG for version 0.3.12

## [0.3.11] - 2025-05-09

### 🚀 Features

- Add visualization error types to XError enum
- Enhance ContinuousProcess and TAMSD with new methods
- Add variance method to TAMSD for enhanced statistical analysis

### 💼 Other

- Implement CIR process simulation and visualization
- Update output formatting in CIR example for improved readability

### 🚜 Refactor

- Use iterator style for path generation in Langevin simulations

### 📚 Documentation

- Enhance README examples with additional print statements
- Update README files to simplify descriptions and enhance clarity
- Update README files to include type annotations for methods
- Update README files to remove unnecessary type annotations
- Update README-zh.md to correct terminology for methods
- Update README files to improve clarity and consistency in random distributions and stochastic processes
- Update README-zh.md for terminology consistency
- Update README files to reflect changes in features and usage
- Update output formatting and terminology in README files
- Improve error handling and documentation in random number generation modules
- Enhance documentation for continuous simulation processes
- Enhance documentation for random walk simulation
- Enhance documentation for birth-death and CTRW processes
- Enhance documentation for circulant embedding and CSV writing
- Enhance documentation for plotting functions
- Update README files with new entries and error message improvements

### ⚙️ Miscellaneous Tasks

- Bump version to 0.3.11 in Cargo.toml

## [0.3.10] - 2025-05-07

### 🚀 Features

- Add `TAMSD` struct and implementation for time-averaged mean square displacement
- Add GaussLegendreError to XError enum
- Refactor README examples to include main function

### 📚 Documentation

- Update traits.rs documentation to include structs

### 🧪 Testing

- Ignore continuous trajectory test for now

### ⚙️ Miscellaneous Tasks

- Update py-diffusion submodule to dirty state
- Add gauss-quad dependency in Cargo.toml
- Add categories and keywords in Cargo.toml
- Bump version to 0.3.10 in Cargo.toml
- Update CHANGELOG for version 0.3.10
- Remove keywords from Cargo.toml

## [0.3.9] - 2025-05-06

### 🚀 Features

- Implement From trait for PlotterError to XError

### ⚙️ Miscellaneous Tasks

- Bump version to 0.3.9 in Cargo.toml

## [0.3.8] - 2025-05-06

### 🐛 Bug Fixes

- Expose csv module in utils for better accessibility

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.7
- Add py-diffusion submodule
- Bump version to 0.3.8 in Cargo.toml

## [0.3.7] - 2025-05-06

### 🚀 Features

- Add ensure_output_dir function to handle output directory creation
- Integrate ensure_output_dir in write_csv function

### 🚜 Refactor

- Remove ensure_output_dir function from draw.rs

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.6
- Bump version to 0.3.7 in Cargo.toml

## [0.3.6] - 2025-05-06

### 🚀 Features

- Add Geometric Brownian motion simulation
- Add Geometric Brownian motion module
- Enhance ContinuousProcess and DiscreteProcess traits
- Add CSV error handling and CSV writing functionality
- Add CSV feature to default dependencies in Cargo.toml

### 🐛 Bug Fixes

- Mark GeometricBrownianMotion as completed in TODO list

### 🚜 Refactor

- Remove unused methods from continuous process simulations
- Remove unused simulation methods from RandomWalk
- Remove unused simulation methods from BirthDeath, CTRW, and Poisson

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.5
- Bump version to 0.3.6 in Cargo.toml

## [0.3.5] - 2025-04-29

### 🚀 Features

- Add Brownian meander simulation implementation
- Add Brownian meander module to continuous simulation
- Add Asymmetric Lévy process simulation
- Add Cauchy and Asymmetric Cauchy process simulations
- Add Gamma distribution random number generation
- Add Inverse process for continuous processes
- Implement Gamma process simulation

### 🐛 Bug Fixes

- Improve error handling and documentation in random distributions
- Update README documentation path for consistency

### 🚜 Refactor

- Simplify Brownian excursion simulation logic
- Improve code readability and structure in Brownian meander simulation

### 📚 Documentation

- Update README for random number generation and visualization
- Update README to include Brownian meander
- Update documentation to include Brownian meander in simulation module
- Mark Brownian meander as completed in TODO list
- Update README for visualization configuration consistency
- Add Cauchy process to README
- Update simulation module documentation to include Cauchy process
- Mark Cauchy process as completed in TODO list
- Add Chinese version link to README
- Update README for improved clarity and links
- Update random module documentation to include Gamma distribution
- Update Levy and Subordinator simulation examples for clarity
- Add Gamma process to README
- Add Gamma process to simulation documentation
- Mark Gamma process as completed in TODO list

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.4
- Update authors and description in Cargo.toml
- Bump version to 0.3.5 in Cargo.toml

## [0.3.4] - 2025-04-24

### 🚀 Features

- Add FFT planner lock error to XError enum
- Enhance CirculantEmbedding with eigenvalue caching and FFT plans
- Enhance CirculantEmbedding with eigenvalue computation and caching
- Add Brownian excursion example simulation
- Add Brownian excursion simulation implementation
- Add visualization test for Brownian motion
- Update trajectory visualization to SVG format

### 🐛 Bug Fixes

- Replace unwrap with ? in simulation methods for better error handling
- Correct occupation time parameter in Brownian excursion test

### 💼 Other

- Add Brownian bridge example simulation

### 🚜 Refactor

- Update simulation return types from PointPair to Pair
- Simplify type casting in simulation methods
- Update CTRW simulation methods for improved clarity
- Update PlotConfig defaults and improve data handling

### 📚 Documentation

- Update documentation for random and simulation modules
- Update TODO list to mark BrownianBridge as completed
- Add Brownian excursion to the README files
- Add Brownian excursion description to simulation module
- Update mod.rs to include Brownian excursion in module exports
- Update TODO list to mark BrownianExcursion as completed

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.3
- Comment out unused pre-commit hooks for Rust
- Update dependency versions in Cargo.toml
- Update GitHub Actions workflow to include stable branch
- Update dependencies and version in Cargo.toml

## [0.3.3] - 2025-04-15

### 🚀 Features

- Add deny.toml configuration file for cargo-deny
- Add pre-commit configuration for Rust and Python
- Implement Brownian bridge simulation

### 📚 Documentation

- Update mod.rs to include Brownian bridge in the simulation module documentation
- Update README files to include Brownian bridge in the list of processes

### ⚙️ Miscellaneous Tasks

- Bump version to 0.3.2 in Cargo.toml
- Update CHANGELOG for version 0.3.2
- Update GitHub Actions workflow to include specific file paths for Rust files
- Comment out unused pre-commit hooks for Rust
- Bump version to 0.3.3 in Cargo.toml

## [0.3.2] - 2025-04-05

### 🚀 Features

- Enhance Fbm simulation and CirculantEmbedding functionality
- Add error handling for non-positive definite matrices

### 🚜 Refactor

- Update default implementations for simulation structs
- Clean up error messages in error.rs
- Update error messages for clarity
- Clean up error messages in error.rs

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.1
- Update GitHub Actions workflow to install dependencies
- Add optional dependency once_cell in Cargo.toml

## [0.3.1] - 2025-03-31

### 🚀 Features

- Add TODO list for stochastic processes
- Introduce discrete process and trajectory traits
- Add discrete module for simulation
- Add random walk module to discrete simulation
- Implement LatticeRandomWalk for discrete simulation
- Implement RandomWalk struct for discrete simulation

### 🐛 Bug Fixes

- Correct capitalization in Chinese and English README files

### 🚜 Refactor

- Change module visibility to public in simulation files
- Update types in discrete simulation traits

### 📚 Documentation

- Enhance error handling documentation for diffusionx crate
- Enhance documentation and structure for stochastic processes
- Update benchmark section in README files
- Remove software environment details from Chinese README
- Improve comments in Brownian motion simulation
- Update README files to include DiscreteProcess trait
- Update README files to include Random Walk

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.3.0
- Remove unused benchmark for random number generation
- Bump version to 0.3.1 in Cargo.toml

## [0.3.0] - 2025-03-22

### 🚀 Features

- Update CHANGELOG for version 0.2.2
- Add plotting functions for continuous and point trajectories
- Refactor simulation modules and add continuous processes
- Update documentation for version 0.2.2 and add visualization examples

### 🐛 Bug Fixes

- Update documentation for functional distribution simulation

### ⚙️ Miscellaneous Tasks

- Bump version to 0.3.0 in Cargo.toml

## [0.2.2] - 2025-03-20

### 🚀 Features

- Implement Exponential, Normal, and Poisson distributions with error handling
- Add InvalidParameters error variant to XError enum
- Enhance visualization of Ornstein-Uhlenbeck process
- Enhance PlotConfig and visualization functionality
- Update version and add visualization feature

### 💼 Other

- Add examples for various stochastic processes

### ⚙️ Miscellaneous Tasks

- Update CHANGELOG for version 0.2.1
- Update GitHub Actions workflow to limit branches for push and pull requests
- Update .gitignore to include tmp directory

## [0.2.1] - 2025-03-18

### 🚀 Features

- Add visualization feature and enhance error handling

### ⚙️ Miscellaneous Tasks

- Bump version to 0.2.1 and update dependencies

## [0.2.0] - 2025-03-18

### 🚀 Features

- *(visualization)* Add optional visualization feature with Plotters integration
- *(visualization)* Enhance visualization capabilities with new PlotConfig and plotter modules
- *(error)* Add VisualizationError and PlotterError enums for enhanced error handling in visualization
- *(visualization)* Add time_step field and drawing trait for visualization
- *(error)* Add InvalidColor variant to PlotterError enum for enhanced error reporting
- *(visualization)* Enhance PlotConfig with new fields and color handling
- *(visualization)* Enhance PlotConfig and Visualize trait for improved plotting
- Update version to 0.2.0 and add visualization feature

### 🐛 Bug Fixes

- *(visualization)* Update PlotConfig struct for improved type handling
- *(tests)* Update occupation time assertions for stability

### 🚜 Refactor

- *(functions)* Remove sine and cosine functions for pi calculations
- *(functions)* Remove gamma function documentation
- *(visualization)* Update .gitignore and remove plotter module
- *(visualization)* Simplify RGBColor conversion in Color enum
- *(visualization)* Remove visualization module and related dependencies

### 📚 Documentation

- *(changelog)* Update CHANGELOG.md for version 0.1.9

### ⚙️ Miscellaneous Tasks

- *(dependencies)* Simplify Cargo.toml by removing features section and updating optional dependencies to required
- *(visualization)* Comment out plotter module and its usage
- *(workflow)* Update GitHub Actions to include 'plot' branch for CI

## [0.1.9] - 2025-03-12

### 🚀 Features

- *(simulation)* Add Birth-death process simulation module

### 📚 Documentation

- *(readme)* Update roadmap with Birth-death process feature

### ⚙️ Miscellaneous Tasks

- *(changelog)* Update CHANGELOG.md for version 0.1.8
- *(version)* Bump library version to 0.1.9 in Cargo.toml

## [0.1.8] - 2025-03-08

### 🚀 Features

- *(simulation)* Add Ornstein-Uhlenbeck process simulation module

### 💼 Other

- *(rust-ver 0.1.7)* Bump version to 0.1.7 and update changelog

### 🚜 Refactor

- Restructure project and remove Python bindings to a new repo
- *(simulation)* Generalize Langevin and Generalized Langevin structs with generic function types

### 📚 Documentation

- Refactor README for improved clarity and content
- Update README language links and formatting
- *(readme)* Enhance README with comprehensive library overview and refined examples

### 🧪 Testing

- Refactor test suites for simulation modules
- Modify Langevin test case to remove strict assertion

## [Rust-v0.1.7] - 2025-03-05

### 🚀 Features

- *(py-diffusionx)* Add support for FBM, CTRW and Langevin processes
- *(levy_walk)* Add Levy walk simulation module

### 🚜 Refactor

- Format

### 📚 Documentation

- *(changelog)* Add entries for Python-v0.1.3 and Rust-v0.1.6 releases

## [Rust-v0.1.6] - 2025-03-04

### 🚀 Features

- *(CTRW)* Add continuous-time random walk model

### 💼 Other

- Bump Rust crate version 0.1.6

### 📚 Documentation

- *(CHANGELOG)* Update changelog for Rust v0.1.5 release
- *(bm,fbm)* Improve documentation and code formatting

## [Rust-v0.1.5] - 2025-03-01

### 🚀 Features

- *(Rust)* Add Circulant Embedding Method for Gaussian Random Fields
- *(Simulation)* Implement Fractional Brownian Motion (fBm) simulation

### 🚜 Refactor

- *(Simulation)* Improve code formatting and import organization
- *(circulant_embedding.rs)* Enhance performance and add variance normalization
- *(circulant_embedding.rs)* Remove variance normalization code
- *(utils)* Reorganize utility functions and add circulant embedding module

### ⚙️ Miscellaneous Tasks

- *(Dependencies)* Upgrade Rust dependencies for advanced numerical computing
- *(Dependencies)* Remove ndarray dependency from project

## [Rust-v0.1.4] - 2025-02-24

### 🚀 Features

- *(Rust)* Add occupation time for inverse subordinator
- *(Python)* Add functional simulation methods for first passage time and occupation time
- *(Python)* Add Poisson, Subordinator, and Inverse Subordinator simulation classes
- *(Rust)* Add Langevin equation simulation module
- *(Simulation)* Add Generalized Langevin Equation Simulation
- *(Simulation)* Add Subordinated Langevin Equation Simulation

### 🐛 Bug Fixes

- *(Langevin)* Correct stochastic simulation noise scaling

### 💼 Other

- Release Rust version 0.1.3
- Bump Python package version to 0.1.2

### 🚜 Refactor

- *(Langevin)* Remove unnecessary start position validation

### 📚 Documentation

- *(Rust)* Update CHANGELOG for version 0.1.3
- *(CHANGELOG)* Update changelog for Python version 0.1.2
- Update benchmark results with new hardware and software configuration
- *(Rust)* Update README and documentation for Langevin equation implementations

### ⚙️ Miscellaneous Tasks

- Update project dependencies and benchmark performance
- Bump package version to 0.1.4

## [Rust-0.1.3] - 2025-02-21

### 🚀 Features

- *(Rust)* Add subordinator simulation module
- *(Rust)* Add Poisson process simulation module
- *(Rust)* Add callable feature for simulation processes, which needs `nightly`.
- Add point process simulation methods for first passage and occupation time
- *(Rust)* Implement inverse subordinator simulation

### 🚜 Refactor

- Move simulate_with_duration implementation to traits module
- Standardize import statements and code formatting
- Optimize slice copying in point process duration simulation

### 📚 Documentation

- Improve documentation for Brownian motion and Lévy process simulations
- Update README with subordinator process roadmap
- *(Rust)* Implement subordinator and Poisson process simulations

### ⚙️ Miscellaneous Tasks

- Remove rust-toolchain.toml configuration
- Update Rust toolchain and license configuration
- Remove callable feature and nightly Rust toolchain

## [Rust-v0.1.2] - 2025-02-19

### 🚀 Features

- Add occupation time functionality
- Add Lévy process simulation and related functionality
- Add occupation time for Brownian motion

### 🐛 Bug Fixes

- *(Python)* Add input validation for Brownian motion and Lévy process methods

### 💼 Other

- Lower Python version requirement to 3.9

### 🚜 Refactor

- Remove gamma function implementations from utils
- Enhance simulation traits with continuous and point process abstractions
- Update Brownian motion and Lévy process simulation traits
- Optimize occupation time calculation using iterator methods
- Improve code formatting and import organization
- Introduce simulation prelude module for simplified imports
- Expose simulation module traits and functional components

### 📚 Documentation

- Add comprehensive README for Python package
- Update README with new features and progress
- Update project roadmap and feature tracking
- Update README files with comprehensive random number generation and simulation examples

### ⚙️ Miscellaneous Tasks

- Add PyPI publication workflow for Python package
- Switch Rust toolchain from stable to beta in publish workflow
- Remove test step from Python publish workflow
- Add changelog and git-cliff configuration
- Update CHANGELOG.md with recent project developments
- Bump project version to 0.1.2
- Prepare Rust release v0.1.2

## [0.1.0] - 2025-02-19

### 🚀 Features

- Add minmax utility function for finding min and max values in f64 arrays
- Add first passage time (FPT) calculation for Brownian motion
- Enhance first passage time (FPT) calculation with max duration
- Add Levy process simulation module

### 💼 Other

- Add justfile for generating Rust documentation

### 🚜 Refactor

- Traits
- Update Brownian motion simulation and traits
- Simplify Moment and Functional trait implementations
- Remove unused unchecked Brownian motion constructor
- Restructure simulation traits and add first passage time functionality
- Implement StochasticProcess and Trajectory for Brownian motion
- Remove nightly feature and related code

### 📚 Documentation

- Update README with comprehensive library overview and usage examples
- Simplify README with focused usage examples
- Update README with refined usage examples and syntax
- Update README with first passage time (FPT) example
- Refine README with updated Brownian motion simulation examples
- 中文,  English docs
- Update README with first passage time (FPT) max duration example
- Generate Rust documentation for DiffusionX library
- Update Rust documentation for DiffusionX library
- Modify justfile to clean documentation directory before generation
- Add documentation badge to README files
- Add Julia version reference to README files
- Update Rust documentation for simulation module
- Update README examples for Brownian motion simulation
- Add extensibility section to README files
- Minor README update for extensibility section
- Update documentation links in README files
- Update documentation badge links to Rust documentation path
- Minor documentation updates and formatting improvements
- Remove generated Rust documentation files

### 🧪 Testing

- Add comprehensive random number generation tests
- *(rust)* Add statistical utility functions for random number generation tests
- *(python)* Enhance stable distribution random number generation tests

### ⚙️ Miscellaneous Tasks

- Minor formatting in types module
- Add GitHub Pages deployment workflow for documentation

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