Definition df-evpm 17912

Description: Define the set of even permutations on a given set. (Contributed by Stefan O'Rear, 9-Jul-2018.)

Assertion

Ref	Expression
df-evpm	|- pmEven = ( d e. _V |-> ( `' (pmSgn ` d ) " { 1 } ) )

Detailed syntax breakdown of Definition df-evpm

Step	Hyp	Ref	Expression
1		cevpm 17910	. 2 class pmEven
2		vd	. . 3 setvar d
3		cvv 3200	. . 3 class _V
4	2	cv 1482	. . . . . 6 class d
5		cpsgn 17909	. . . . . 6 class pmSgn
6	4, 5	cfv 5888	. . . . 5 class (pmSgn ` d )
7	6	ccnv 5113	. . . 4 class `' (pmSgn ` d )
8		c1 9937	. . . . 5 class 1
9	8	csn 4177	. . . 4 class { 1 }
10	7, 9	cima 5117	. . 3 class ( `' (pmSgn ` d ) " { 1 } )
11	2, 3, 10	cmpt 4729	. 2 class ( d e. _V |-> ( `' (pmSgn ` d ) " { 1 } ) )
12	1, 11	wceq 1483	1 wff pmEven = ( d e. _V |-> ( `' (pmSgn ` d ) " { 1 } ) )

This definition is referenced by:  evpmss  19932  psgnevpmb  19933