Definition df-s1 13302

Description: Define the canonical injection from symbols to words. (Contributed by Stefan O'Rear, 15-Aug-2015.) (Revised by Mario Carneiro, 26-Feb-2016.)

Assertion

Ref	Expression
df-s1	|- <" A "> = { <. 0 , ( _I ` A ) >. }

Detailed syntax breakdown of Definition df-s1

Step	Hyp	Ref	Expression
1		cA	. . 3 class A
2	1	cs1 13294	. 2 class <" A ">
3		cc0 9936	. . . 4 class 0
4		cid 5023	. . . . 5 class _I
5	1, 4	cfv 5888	. . . 4 class ( _I ` A )
6	3, 5	cop 4183	. . 3 class <. 0 , ( _I ` A ) >.
7	6	csn 4177	. 2 class { <. 0 , ( _I ` A ) >. }
8	2, 7	wceq 1483	1 wff <" A "> = { <. 0 , ( _I ` A ) >. }

This definition is referenced by:  ids1  13377  s1val  13378  s1eq  13380  s1len  13385  s1nz  13386  funcnvs1  13657