Question:  Poème élégiaque in D minor was dedicated to a composer whose best-known works are "Pavane", "Après un rêve" and what? 
Sentence (from "Poème élégiaque in D minor, Op.12 (Ysaÿe)"): Dedicated to Gabriel Fauré, it served as an inspiration for Ernest Chausson's own Poème, Op. 25.
Relevant evidence: Yes