Since there are separate tags for a) ODEs, ca.classical-analysis-and-odes and differential-equations and for b) ap.analysis-of-pdes but only one tag for stochastic-differential-equations, I was wondering if it is worth creating a new tag called "stochastic partial differential equations".

This is to accommodate the topics found in SPDE books such as Da-Prato and Zabczyk's book "Stochastic equations in infinite dimensions".

- Equations with additive noise or multiplicative noise
- Martingale solutions
- Large time behavior of solutions
- Small noise asymptotic behavior

and many new emerging topics such as

- Regularity structures
- Paracontrolled calculus
- Rough paths (which already has it own tag rough-paths).

(1)the tag info for stochastic-differential-equations includes:"Stochastic ordinary and partial differential equations"(2)at this date, the number of questions with given tag: ap.analysis-of-pdes: 3795; ca.classical-analysis-and-odes: 3141; differential-equations: 1460; stochastic-differential-equations: 472. $\endgroup$