Amssymb Conflict with Unicode-math

[czhang03]

When loading both the unicode-math package and quiver package, a conflict arises between unicode-math and amssymb (which quiver depends upon), error messages are as follows:

Command `\eth' already defined.
Command `\smallsetminus' already defined.
Command `\digamma' already defined.
Command `\backepsilon' already defined.

A hack is to unset these commands before loading the quiver package:

% use quiver drawings
% remove commands that are in conflict with unicode-math
\let\eth\undefined
\let\smallsetminus\undefined
\let\digamma\undefined
\let\backepsilon\undefined
\usepackage{quiver}