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Theorem f1oeq1 5145
Description: Equality theorem for one-to-one onto functions. (Contributed by NM, 10-Feb-1997.)
Assertion
Ref Expression
f1oeq1 (𝐹 = 𝐺 → (𝐹:𝐴1-1-onto𝐵𝐺:𝐴1-1-onto𝐵))

Proof of Theorem f1oeq1
StepHypRef Expression
1 f1eq1 5115 . . 3 (𝐹 = 𝐺 → (𝐹:𝐴1-1𝐵𝐺:𝐴1-1𝐵))
2 foeq1 5130 . . 3 (𝐹 = 𝐺 → (𝐹:𝐴onto𝐵𝐺:𝐴onto𝐵))
31, 2anbi12d 450 . 2 (𝐹 = 𝐺 → ((𝐹:𝐴1-1𝐵𝐹:𝐴onto𝐵) ↔ (𝐺:𝐴1-1𝐵𝐺:𝐴onto𝐵)))
4 df-f1o 4937 . 2 (𝐹:𝐴1-1-onto𝐵 ↔ (𝐹:𝐴1-1𝐵𝐹:𝐴onto𝐵))
5 df-f1o 4937 . 2 (𝐺:𝐴1-1-onto𝐵 ↔ (𝐺:𝐴1-1𝐵𝐺:𝐴onto𝐵))
63, 4, 53bitr4g 216 1 (𝐹 = 𝐺 → (𝐹:𝐴1-1-onto𝐵𝐺:𝐴1-1-onto𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 101  wb 102   = wceq 1259  1-1wf1 4927  ontowfo 4928  1-1-ontowf1o 4929
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-io 640  ax-5 1352  ax-7 1353  ax-gen 1354  ax-ie1 1398  ax-ie2 1399  ax-8 1411  ax-10 1412  ax-11 1413  ax-i12 1414  ax-bndl 1415  ax-4 1416  ax-17 1435  ax-i9 1439  ax-ial 1443  ax-i5r 1444  ax-ext 2038
This theorem depends on definitions:  df-bi 114  df-3an 898  df-tru 1262  df-nf 1366  df-sb 1662  df-clab 2043  df-cleq 2049  df-clel 2052  df-nfc 2183  df-v 2576  df-un 2950  df-in 2952  df-ss 2959  df-sn 3409  df-pr 3410  df-op 3412  df-br 3793  df-opab 3847  df-rel 4380  df-cnv 4381  df-co 4382  df-dm 4383  df-rn 4384  df-fun 4932  df-fn 4933  df-f 4934  df-f1 4935  df-fo 4936  df-f1o 4937
This theorem is referenced by:  f1oeq123d  5151  f1ocnvb  5168  f1orescnv  5170  f1ovi  5193  f1osng  5195  f1oresrab  5357  fsn  5363  isoeq1  5469  f1oen3g  6265  ensn1  6307  xpcomf1o  6330
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