Differential and difference equations with applications : contributions from the International Conference on Differential & Difference Equations and Applications / Sandra Pinelas, Michel Chipot, Zuzana Dosla, editors. (OCLC #829754700)

The title page says that the three people listed are “editors”, so which relator term to use? “editor”? “editor of compilation”?

This title is a conference proceedings (a Festschrift, even!), so consists mainly of papers, individual works with their own creators. The editors wrote the brief preface, and likely did some editing/formatting of the collected works, so they fit the definition of “editor of compilation”.