Theorem nff1o 6770

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

Step	Hyp	Ref	Expression
1		df-f1o 6497	. 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
5	2, 3, 4	nff1 6726	. . 3 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵
6	2, 3, 4	nffo 6743	. . 3 ⊢ Ⅎ𝑥 𝐹:𝐴–onto→𝐵
7	5, 6	nfan 1900	. 2 ⊢ Ⅎ𝑥(𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵)
8	1, 7	nfxfr 1854	1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵

Syntax hints:   ∧ wa 395  Ⅎwnf 1784  Ⅎwnfc 2881  –1-1→wf1 6487  –onto→wfo 6488  –1-1-onto→wf1o 6489

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2706

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-clab 2713  df-cleq 2726  df-clel 2809  df-nfc 2883  df-ral 3050  df-rab 3398  df-v 3440  df-dif 3902  df-un 3904  df-ss 3916  df-nul 4284  df-if 4478  df-sn 4579  df-pr 4581  df-op 4585  df-br 5097  df-opab 5159  df-rel 5629  df-cnv 5630  df-co 5631  df-dm 5632  df-rn 5633  df-fun 6492  df-fn 6493  df-f 6494  df-f1 6495  df-fo 6496  df-f1o 6497

This theorem is referenced by:  nfiso  7266  nfsum1  15611  nfsum  15612  nfcprod1  15829  nfcprod  15830  fsumiunle  32859  esumiun  34200  stoweidlem35  46221