Connection of hypocoercivity and hypocontractivity via the $\theta$-methods
math.DS2026-05v1license
Abstract
Recent literature shows that hypocoercivity properties of linear evolution equations (in particular their exponential decay and the sharp short time decay of their propagator norm) carry over to their discretization via the midpoint rule. This note discusses this connection for the (other) -methods, i.e.\ for . It is shown that any implicit discretization with (pertaining to a hypocoercive continuous-time evolution equation) is contractive, and not only hypocontractive -- in contrast to the midpoint rule. For a coercive continuous-time evolution equation, a discretization with is contractive for time steps small enough.
Comments: 7 pages
Cite
@article{arxiv.2605.30197,
title = {Connection of hypocoercivity and hypocontractivity via the $\theta$-methods},
author = {Anton Arnold and Stefan Egger},
journal= {arXiv preprint arXiv:2605.30197},
year = {2026}
}