Theorem nfmpo1 7429

Description: Bound-variable hypothesis builder for an operation in maps-to notation. (Contributed by NM, 27-Aug-2013.)

Assertion

Ref	Expression
nfmpo1	⊢ Ⅎ𝑥(𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶)

Proof of Theorem nfmpo1

Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-mpo 7354	. 2 ⊢ (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)}
2		nfoprab1 7410	. 2 ⊢ Ⅎ𝑥{⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 = 𝐶)}
3	1, 2	nfcxfr 2889	1 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶)

Syntax hints:   ∧ wa 395   = wceq 1540   ∈ wcel 2109  Ⅎwnfc 2876  {coprab 7350   ∈ cmpo 7351

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701

This theorem depends on definitions:  df-bi 207  df-an 396  df-ex 1780  df-nf 1784  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-oprab 7353  df-mpo 7354

This theorem is referenced by:  ovmpos  7497  ov2gf  7498  ovmpodxf  7499  ovmpodf  7505  ovmpodv2  7507  xpcomco  8984  mapxpen  9060  pwfseqlem2  10553  pwfseqlem4a  10555  pwfseqlem4  10556  gsum2d2lem  19852  gsum2d2  19853  gsumcom2  19854  dprd2d2  19925  cnmpt21  23556  cnmpt2t  23558  cnmptcom  23563  cnmpt2k  23573  xkocnv  23699  numclwlk2lem2f1o  30323  finxpreclem2  37374  mnringmulrcld  44211  fmuldfeqlem1  45573  fmuldfeq  45574  ovmpordxf  48333