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Theorem nff1o 5640
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 5387 . 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 5599 . . 3 Ⅎ𝑥 𝐹:𝐴–1-1→𝐵
62, 3, 4nffo 5617 . . 3 Ⅎ𝑥 𝐹:𝐴–onto→𝐵
75, 6nfan 1618 . 2 Ⅎ𝑥(𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵)
81, 7nfxfr 1527 1 Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵
Colors of variables:    wff set class
This proof depends on syntax axioms:   ∧ wa 104  Ⅎwnf 1513  Ⅎwnfc 2379  –1-1→wf1 5377  –onto→wfo 5378  –1-1-onto→wf1o 5379
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3715  df-pr 3716  df-op 3718  df-br 4132  df-opab 4194  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-fun 5382  df-fn 5383  df-f 5384  df-f1 5385  df-fo 5386  df-f1o 5387
This theorem is used by:  nfiso  6015  nfsum1  12147  nfsum  12148  nfcprod1  12346  nfcprod  12347
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