Who Cites anti sym?
anti_sym	Def AntiSym(T;x,y.R(x;y)) == x,y:T. R(x;y)  R(y;x)  x = y
	Thm* T:Type, R:(TTProp). AntiSym(T;x,y.R(x,y))  Prop

Syntax:

AntiSym(T;x,y.R(x;y))

has structure:

anti_sym(T; x,y.R(x;y))

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