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Theorem nff1 6806
Description: Bound-variable hypothesis builder for a one-to-one function. (Contributed by NM, 16-May-2004.)
Hypotheses
Ref Expression
nff1.1 Ⅎ𝑥𝐹
nff1.2 Ⅎ𝑥𝐴
nff1.3 Ⅎ𝑥𝐵
Assertion
Ref Expression
nff1 Ⅎ𝑥 𝐹:𝐴⟶1-1𝐵

Proof of Theorem nff1
StepHypRef Expression
1 df-f1 6571 . 2 (𝐹:𝐴⟶1-1𝐵 ↔ (𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹))
2 nff1.1 . . . 4 Ⅎ𝑥𝐹
3 nff1.2 . . . 4 Ⅎ𝑥𝐴
4 nff1.3 . . . 4 Ⅎ𝑥𝐵
52, 3, 4nff 6735 . . 3 Ⅎ𝑥 𝐹:𝐴⟶𝐵
62nfcnv 5868 . . . 4 Ⅎ𝑥◡𝐹
76nffun 6590 . . 3 Ⅎ𝑥Fun ◡𝐹
85, 7nfan 1934 . 2 Ⅎ𝑥(𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹)
91, 8nfxfr 1886 1 Ⅎ𝑥 𝐹:𝐴⟶1-1𝐵
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ∧ wa 401  Ⅎwnf 1816  Ⅎwnfc 2911  ◡ccnv 5657  Fun wfun 6560  ⟶wf 6562  ⟶1-1wf1 6563
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ral 3081  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-br 5109  df-opab 5174  df-rel 5665  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-fun 6568  df-fn 6569  df-f 6570  df-f1 6571
This theorem is used by:  nff1o  6852  iundom2g  10663  onprcf1of1ord  36096
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