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Definition df-s1 12449
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
StepHypRef Expression
1 cA . . 3  class  A
21cs1 12441 . 2  class  <" A ">
3 cc0 9403 . . . 4  class  0
4 cid 4704 . . . . 5  class  _I
51, 4cfv 5496 . . . 4  class  (  _I 
`  A )
63, 5cop 3950 . . 3  class  <. 0 ,  (  _I  `  A
) >.
76csn 3944 . 2  class  { <. 0 ,  (  _I  `  A ) >. }
82, 7wceq 1399 1  wff  <" A ">  =  { <. 0 ,  (  _I  `  A ) >. }
Colors of variables: wff setvar class
This definition is referenced by:  ids1  12518  s1val  12519  s1eq  12521  s1len  12526
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