Crate momtrop 

momtrop is a flexible Rust library for tropical Feynman sampling of loop integrals in momentum space (https://arxiv.org/abs/2504.09613). It allows users to define graphs with arbitrary edge weights, dimensions, and external kinematics, and supports custom floating-point types via the MomtropFloat trait.

The library only takes care of sample generation, and defers the evaluation of the integrand to the user.

Modules

float

gamma

matrix

vector

Structs

Edge

Edge struct from which a graph can be specified.

Graph

Main graph struct from which a sampler can be build. This graph should be stripped of tree-like and external edges. Vertices which would have external edges attached to them must be added to the externals field.

Metadata

Optional metadata for advanced users, see \citation for the definition of the fields in this struct.

SampleGenerator

Sampler struct from which sample points can be generated.

TropicalSampleResult

Return type of the sample function

TropicalSamplingSettings

Struct containing all runtime settings.

Constants

MAX_EDGES

Maximum number of edges supported by momtrop.

MAX_VERTICES

Maximum number of vertices supported by momtrop.

Functions

assert_approx_eq