Theorem reseq2d 5019

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

Hypothesis

Ref	Expression
reseqd.1	⊢ (𝜑 → 𝐴 = 𝐵)

Assertion

Ref	Expression
reseq2d	⊢ (𝜑 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))

Proof of Theorem reseq2d

Step	Hyp	Ref	Expression
1		reseqd.1	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
2		reseq2 5014	. 2 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))
3	1, 2	syl 14	1 ⊢ (𝜑 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))

Syntax hints:   → wi 4   = wceq 1398   ↾ cres 4733

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-v 2805  df-in 3207  df-opab 4156  df-xp 4737  df-res 4743

This theorem is referenced by:  reseq12d  5020  resima2  5053  relresfld  5273  f1orescnv  5608  funcocnv2  5617  fococnv2  5618  fnressn  5848  oprssov  6174  dftpos2  6470  fnsnsplitdc  6716  dif1en  7111  sbthlemi4  7202  fseq1p1m1  10372  resunimafz0  11139  setsvala  13174  gsumsplit0  13994  metreslem  15171  xmspropd  15268  mspropd  15269  egrsubgr  16184  eupthvdres  16396  eupth2lem3fi  16397  eupth2fi  16400  bj-charfundcALT  16505