Definition df-s1 13157

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 13149	. 2 class ⟨“𝐴”⟩
3		cc0 9815	. . . 4 class 0
4		cid 4948	. . . . 5 class I
5	1, 4	cfv 5804	. . . 4 class ( I ‘𝐴)
6	3, 5	cop 4131	. . 3 class ⟨0, ( I ‘𝐴)⟩
7	6	csn 4125	. 2 class {⟨0, ( I ‘𝐴)⟩}
8	2, 7	wceq 1475	1 wff ⟨“𝐴”⟩ = {⟨0, ( I ‘𝐴)⟩}

This definition is referenced by:  ids1  13230  s1val  13231  s1eq  13233  s1len  13238  s1nz  13239  funcnvs1  13507