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Theorem f1eq1 5537
Description: Equality theorem for one-to-one functions. (Contributed by NM, 10-Feb-1997.)
Assertion
Ref Expression
f1eq1 (𝐹 = 𝐺 → (𝐹:𝐴1-1𝐵𝐺:𝐴1-1𝐵))

Proof of Theorem f1eq1
StepHypRef Expression
1 feq1 5465 . . 3 (𝐹 = 𝐺 → (𝐹:𝐴𝐵𝐺:𝐴𝐵))
2 cnveq 4904 . . . 4 (𝐹 = 𝐺𝐹 = 𝐺)
32funeqd 5348 . . 3 (𝐹 = 𝐺 → (Fun 𝐹 ↔ Fun 𝐺))
41, 3anbi12d 473 . 2 (𝐹 = 𝐺 → ((𝐹:𝐴𝐵 ∧ Fun 𝐹) ↔ (𝐺:𝐴𝐵 ∧ Fun 𝐺)))
5 df-f1 5331 . 2 (𝐹:𝐴1-1𝐵 ↔ (𝐹:𝐴𝐵 ∧ Fun 𝐹))
6 df-f1 5331 . 2 (𝐺:𝐴1-1𝐵 ↔ (𝐺:𝐴𝐵 ∧ Fun 𝐺))
74, 5, 63bitr4g 223 1 (𝐹 = 𝐺 → (𝐹:𝐴1-1𝐵𝐺:𝐴1-1𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1397  ccnv 4724  Fun wfun 5320  wf 5322  1-1wf1 5323
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 2213
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331
This theorem is referenced by:  f1oeq1  5571  f1eq123d  5575  fun11iun  5604  fo00  5621  tposf12  6434  f1dom4g  6925  f1dom2g  6928  f1domg  6930  dom3d  6946  domtr  6958  dom1o  7001  djudom  7291  difinfsn  7298  djudoml  7433  djudomr  7434  4sqlem11  12973  nninfdc  13073  conjsubgen  13864
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