Theorem ineq2i 3357

Description: Equality inference for intersection of two classes. (Contributed by NM, 26-Dec-1993.)

Hypothesis

Ref	Expression
ineq1i.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
ineq2i	⊢ (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)

Proof of Theorem ineq2i

Step	Hyp	Ref	Expression
1		ineq1i.1	. 2 ⊢ 𝐴 = 𝐵
2		ineq2 3354	. 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵))
3	1, 2	ax-mp 5	1 ⊢ (𝐶 ∩ 𝐴) = (𝐶 ∩ 𝐵)

Syntax hints:   = wceq 1364   ∩ cin 3152

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 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175

This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-v 2762  df-in 3159

This theorem is referenced by:  in4  3375  inindir  3377  indif2  3403  difun1  3419  dfrab3ss  3437  dfif3  3570  intunsn  3908  rint0  3909  riin0  3984  res0  4946  resres  4954  resundi  4955  resindi  4957  inres  4959  resiun2  4962  resopab  4986  dfse2  5038  dminxp  5110  imainrect  5111  resdmres  5157  funimacnv  5330  unfiin  6982  sbthlemi5  7020  dmaddpi  7385  dmmulpi  7386  fsumiun  11620  ressval2  12684  ressval3d  12690