Theorem inteqi 3931

Description: Equality inference for class intersection. (Contributed by NM, 2-Sep-2003.)

Hypothesis

Ref	Expression
inteqi.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
inteqi	⊢ ∩ 𝐴 = ∩ 𝐵

Proof of Theorem inteqi

Step	Hyp	Ref	Expression
1		inteqi.1	. 2 ⊢ 𝐴 = 𝐵
2		inteq 3930	. 2 ⊢ (𝐴 = 𝐵 → ∩ 𝐴 = ∩ 𝐵)
3	1, 2	ax-mp 5	1 ⊢ ∩ 𝐴 = ∩ 𝐵

Syntax hints:   = wceq 1397  ∩ cint 3927

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2212

This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1810  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514  df-int 3928

This theorem is referenced by:  elintrab  3939  ssintrab  3950  intmin2  3953  intsng  3961  intexrabim  4242  op1stb  4574  bm2.5ii  4593  dfiin3g  4989  op2ndb  5219  bj-dfom  16586  bj-omind  16587