Theorem reseq12i 4933

Description: Equality inference for restrictions. (Contributed by set.mm contributors, 21-Oct-2014.)

Hypotheses

Ref	Expression
reseqi.1	|- A = B
reseqi.2	|- C = D

Assertion

Ref	Expression
reseq12i	|- (A |` C) = (B |` D)

Proof of Theorem reseq12i

Step	Hyp	Ref	Expression
1		reseqi.1	. . 3 |- A = B
2	1	reseq1i 4931	. 2 |- (A |` C) = (B |` C)
3		reseqi.2	. . 3 |- C = D
4	3	reseq2i 4932	. 2 |- (B |` C) = (B |` D)
5	2, 4	eqtri 2373	1 |- (A |` C) = (B |` D)

Syntax hints:   = wceq 1642   |` cres 4775

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-v 2862  df-nin 3212  df-compl 3213  df-in 3214  df-opab 4624  df-xp 4785  df-res 4789

This theorem is referenced by:  cnvresid  5167