Theorem reseq2i 4888

Description: Equality inference for restrictions. (Contributed by Paul Chapman, 22-Jun-2011.)

Hypothesis

Ref	Expression
reseqi.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
reseq2i	⊢ (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)

Proof of Theorem reseq2i

Step	Hyp	Ref	Expression
1		reseqi.1	. 2 ⊢ 𝐴 = 𝐵
2		reseq2 4886	. 2 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))
3	1, 2	ax-mp 5	1 ⊢ (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)

Syntax hints:   = wceq 1348   ↾ cres 4613

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-v 2732  df-in 3127  df-opab 4051  df-xp 4617  df-res 4623

This theorem is referenced by:  reseq12i  4889  rescom  4916  resdmdfsn  4934  rescnvcnv  5073  resdm2  5101  funcnvres  5271  funimaexg  5282  resdif  5464  frecfnom  6380  facnn  10661  fac0  10662  expcnv  11467  setsslid  12466  uptx  13068  txcn  13069