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Theorem nff1o 6830
Description: Bound-variable hypothesis builder for a one-to-one onto function. (Contributed by NM, 16-May-2004.)
Hypotheses
Ref Expression
nff1o.1 Ⅎ𝑥𝐹
nff1o.2 Ⅎ𝑥𝐴
nff1o.3 Ⅎ𝑥𝐵
Assertion
Ref Expression
nff1o Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵

Proof of Theorem nff1o
StepHypRef Expression
1 df-f1o 6553 . 2 (𝐹:𝐴–1-1-onto→𝐵 ↔ (𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵))
2 nff1o.1 . . . 4 Ⅎ𝑥𝐹
3 nff1o.2 . . . 4 Ⅎ𝑥𝐴
4 nff1o.3 . . . 4 Ⅎ𝑥𝐵
52, 3, 4nff1 6784 . . 3 Ⅎ𝑥 𝐹:𝐴–1-1→𝐵
62, 3, 4nffo 6803 . . 3 Ⅎ𝑥 𝐹:𝐴–onto→𝐵
75, 6nfan 1933 . 2 Ⅎ𝑥(𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵)
81, 7nfxfr 1885 1 Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ∧ wa 401  Ⅎwnf 1815  Ⅎwnfc 2910  –1-1→wf1 6543  –onto→wfo 6544  –1-1-onto→wf1o 6545
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1944  ax-6 2001  ax-7 2042  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2196  ax-12 2215  ax-ext 2735
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2101  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ral 3080  df-rab 3416  df-v 3455  df-ss 3900  df-dif 4049  df-un 4153  df-nul 4281  df-if 4485  df-sn 4588  df-pr 4590  df-op 4838  df-br 5106  df-opab 5170  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-fun 6548  df-fn 6549  df-f 6550  df-f1 6551  df-fo 6552  df-f1o 6553
This theorem is used by:  nfiso  7337  nfsum1  15869  nfsum  15870  nfcprod1  16089  nfcprod  16090  fsumiunle  33473  esumiun  34779  stoweidlem35  47184
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