Theorem f1oeq3 5230

Description: Equality theorem for one-to-one onto functions. (Contributed by NM, 10-Feb-1997.)

Assertion

Ref	Expression
f1oeq3	⊢ (𝐴 = 𝐵 → (𝐹:𝐶–1-1-onto→𝐴 ↔ 𝐹:𝐶–1-1-onto→𝐵))

Proof of Theorem f1oeq3

Step	Hyp	Ref	Expression
1		f1eq3 5197	. . 3 ⊢ (𝐴 = 𝐵 → (𝐹:𝐶–1-1→𝐴 ↔ 𝐹:𝐶–1-1→𝐵))
2		foeq3 5215	. . 3 ⊢ (𝐴 = 𝐵 → (𝐹:𝐶–onto→𝐴 ↔ 𝐹:𝐶–onto→𝐵))
3	1, 2	anbi12d 457	. 2 ⊢ (𝐴 = 𝐵 → ((𝐹:𝐶–1-1→𝐴 ∧ 𝐹:𝐶–onto→𝐴) ↔ (𝐹:𝐶–1-1→𝐵 ∧ 𝐹:𝐶–onto→𝐵)))
4		df-f1o 5009	. 2 ⊢ (𝐹:𝐶–1-1-onto→𝐴 ↔ (𝐹:𝐶–1-1→𝐴 ∧ 𝐹:𝐶–onto→𝐴))
5		df-f1o 5009	. 2 ⊢ (𝐹:𝐶–1-1-onto→𝐵 ↔ (𝐹:𝐶–1-1→𝐵 ∧ 𝐹:𝐶–onto→𝐵))
6	3, 4, 5	3bitr4g 221	1 ⊢ (𝐴 = 𝐵 → (𝐹:𝐶–1-1-onto→𝐴 ↔ 𝐹:𝐶–1-1-onto→𝐵))

Syntax hints:   → wi 4   ∧ wa 102   ↔ wb 103   = wceq 1289  –1-1→wf1 4999  –onto→wfo 5000  –1-1-onto→wf1o 5001

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1381  ax-7 1382  ax-gen 1383  ax-ie1 1427  ax-ie2 1428  ax-8 1440  ax-11 1442  ax-4 1445  ax-17 1464  ax-i9 1468  ax-ial 1472  ax-i5r 1473  ax-ext 2070

This theorem depends on definitions:  df-bi 115  df-nf 1395  df-sb 1693  df-clab 2075  df-cleq 2081  df-clel 2084  df-in 3003  df-ss 3010  df-f 5006  df-f1 5007  df-fo 5008  df-f1o 5009

This theorem is referenced by:  f1oeq23  5231  f1oeq123d  5234  f1ores  5252  resdif  5259  f1osng  5278  f1oresrab  5447  isoeq5  5566  isoini2  5580  bren  6444  xpcomf1o  6521  frechashgf1o  9800  sumeq1  10708  fisumss  10748  fsumcnv  10794