Forming invariant stochastic differential systems with a given first integral
Abstract
This article proposes a method for forming invariant stochastic differential systems, namely dynamic systems with trajectories belonging to a given smooth manifold. The It\^o or Stratonovich stochastic differential equations with the Wiener component describe dynamic systems, and the manifold is implicitly defined by a differentiable function. A convenient implementation of the algorithm for forming invariant stochastic differential systems within symbolic computation environments characterizes the proposed method. It is based on determining a basis associated with a tangent hyperplane to the manifold. The article discusses the problem of basis degeneration and examines variants that allow for the simple construction of a basis that does not degenerate. Examples of invariant stochastic differential systems are given, and numerical simulations are performed for them.
Cite
@article{arxiv.2601.04865,
title = {Forming invariant stochastic differential systems with a given first integral},
author = {Konstantin A. Rybakov},
journal= {arXiv preprint arXiv:2601.04865},
year = {2026}
}