Section Eeq2.
Variables I X Y Z: Type.
Variables R R': relation2 X Y.
Variable  S: relation2 Y Z.
Variable  T: relation X.
Variable  F: I -> relation2 X Y.

Lemma comp_assoc: forall W: Type, forall U: relation2 Z W,
eeq (comp (comp R S) U) (comp R (comp S U)).