Theorem nff1o 6615

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 6364	. 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 6575	. . 3 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1→𝐵
6	2, 3, 4	nffo 6591	. . 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 1853	1 ⊢ Ⅎ𝑥 𝐹:𝐴–1-1-onto→𝐵

Syntax hints:   ∧ wa 398  Ⅎwnf 1784  Ⅎwnfc 2963  –1-1→wf1 6354  –onto→wfo 6355  –1-1-onto→wf1o 6356

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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-br 5069  df-opab 5131  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364

This theorem is referenced by:  nfiso  7077  nfsum1  15048  nfsumw  15049  nfsum  15050  nfcprod1  15266  nfcprod  15267  fsumiunle  30547  esumiun  31355  stoweidlem35  42327