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Definition df-s1 12545
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

Detailed syntax breakdown of Definition df-s1
StepHypRef Expression
1 cA . . 3
21cs1 12537 . 2
3 cc0 9513 . . . 4
4 cid 4795 . . . . 5
51, 4cfv 5593 . . . 4
63, 5cop 4035 . . 3
76csn 4029 . 2
82, 7wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  ids1  12609  s1val  12610  s1eq  12612  s1len  12617
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