/// # option pricing / implied volatility / greeks
/// bsm
/// baw
/// binomial tree
/// mont carlo
///
/// # robertics
/// particles slam
/// kalman
/// gaussian grid map
/// forward kinametics
///
/// # stochastic process
/// gbm
/// heston
/// jump diffusion
/// sqaure root diffusion
/// resample by weights for particles
///
/// # point cloud
/// -- ransac normal estimation
/// -- voxel grid