Theorem nff1o 6778

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 6505	. 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 6734	. . 3 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵
6	2, 3, 4	nffo 6751	. . 3 ⊢ Ⅎ𝑥 𝐹:𝐴–onto→𝐵
7	5, 6	nfan 1901	. 2 ⊢ Ⅎ𝑥(𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵)
8	1, 7	nfxfr 1855	1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵

Syntax hints:   ∧ wa 395  Ⅎwnf 1785  Ⅎwnfc 2883  –1-1→wf1 6495  –onto→wfo 6496  –1-1-onto→wf1o 6497

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ral 3052  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-ss 3906  df-nul 4274  df-if 4467  df-sn 4568  df-pr 4570  df-op 4574  df-br 5086  df-opab 5148  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505

This theorem is referenced by:  nfiso  7277  nfsum1  15652  nfsum  15653  nfcprod1  15873  nfcprod  15874  fsumiunle  32902  esumiun  34238  stoweidlem35  46463