Theorem inteqi 3879

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 3878	. 2 ⊢ (𝐴 = 𝐵 → ∩ 𝐴 = ∩ 𝐵)
3	1, 2	ax-mp 5	1 ⊢ ∩ 𝐴 = ∩ 𝐵

Syntax hints:   = wceq 1364  ∩ cint 3875

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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178

This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-int 3876

This theorem is referenced by:  elintrab  3887  ssintrab  3898  intmin2  3901  intsng  3909  intexrabim  4187  op1stb  4514  bm2.5ii  4533  dfiin3g  4925  op2ndb  5154  bj-dfom  15663  bj-omind  15664