Hostname: page-component-7b7567c8c-2rsb6 Total loading time: 0 Render date: 2026-11-12T18:14:03.248Z Has data issue: false hasContentIssue false

HIGH ORDER PARACONTROLLED CALCULUS

Published online by Cambridge University Press:  02 December 2019

ISMAËL BAILLEUL
Affiliation:
Univ Rennes, CNRS, IRMAR – UMR 6625, F-35000Rennes, France; ismael.bailleul@univ-rennes1.fr
FRÉDÉRIC BERNICOT
Affiliation:
Laboratoire de Mathématiques Jean Leray, CNRS – Université de Nantes, 2 Rue de la Houssinière 44322 Nantes Cedex 03, France; frederic.bernicot@univ-nantes.fr

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

We develop in this work a general version of paracontrolled calculus that allows to treat analytically within this paradigm a whole class of singular partial differential equations with the same efficiency as regularity structures. This work deals with the analytic side of the story and offers a toolkit for the study of such equations, under the form of a number of continuity results for some operators, while emphasizing the simple and systematic mechanics of computations within paracontrolled calculus, via the introduction of two model operations $\mathsf{E}$ and $\mathsf{F}$. We illustrate the efficiency of this elementary approach on the example of the generalized parabolic Anderson model equation

$$\begin{eqnarray}(\unicode[STIX]{x2202}_{t}+L)u=f(u)\unicode[STIX]{x1D701},\end{eqnarray}$$
on a 3-dimensional closed manifold, and the generalized KPZ equation
$$\begin{eqnarray}(\unicode[STIX]{x2202}_{t}+L)u=f(u)\unicode[STIX]{x1D701}+g(u)(\unicode[STIX]{x2202}u)^{2},\end{eqnarray}$$
driven by a $(1+1)$-dimensional space/time white noise.

Information

Type
Research Article
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s) 2019