Entourages of a composition of funcoids (Solved)

Importance: Medium ✭✭
Author(s): Porton, Victor
Subject: Topology
Recomm. for undergrads: no
Posted by: porton
on: July 12th, 2016
Solved by: Porton, Victor
Conjecture   $ \forall H \in \operatorname{up} (g \circ f) \exists F \in \operatorname{up} f, G \in \operatorname{up} g : H \sqsupseteq G \circ F $ for every composable funcoids $ f $ and $ g $.

There is now a counterexample in Algebraic General Topology book.


*Victor Porton. A blog post

* indicates original appearance(s) of problem.