Axiom ax-weq 40

Description: The equality function has type al -> al -> *, i.e. it is polymorphic over all types, but the left and right type must agree. (New usage is discouraged.) (Contributed by Mario Carneiro, 7-Oct-2014.)

Assertion

Ref	Expression
ax-weq	|- = :(al -> (al -> *))

Detailed syntax breakdown of Axiom ax-weq

Step	Hyp	Ref	Expression
1		hal	. . 3 type al
2		hb 3	. . . 4 type *
3	1, 2	ht 2	. . 3 type (al -> *)
4	1, 3	ht 2	. 2 type (al -> (al -> *))
5		ke 7	. 2 term =
6	4, 5	wffMMJ2t 12	1 wff = :(al -> (al -> *))

This axiom is referenced by:  weq  41