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Theorem nftpos 7539
 Description: Hypothesis builder for transposition. (Contributed by Mario Carneiro, 10-Sep-2015.)
Hypothesis
Ref Expression
nftpos.1 𝑥𝐹
Assertion
Ref Expression
nftpos 𝑥tpos 𝐹

Proof of Theorem nftpos
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 dftpos4 7523 . 2 tpos 𝐹 = (𝐹 ∘ (𝑦 ∈ ((V × V) ∪ {∅}) ↦ {𝑦}))
2 nftpos.1 . . 3 𝑥𝐹
3 nfcv 2913 . . 3 𝑥(𝑦 ∈ ((V × V) ∪ {∅}) ↦ {𝑦})
42, 3nfco 5426 . 2 𝑥(𝐹 ∘ (𝑦 ∈ ((V × V) ∪ {∅}) ↦ {𝑦}))
51, 4nfcxfr 2911 1 𝑥tpos 𝐹
 Colors of variables: wff setvar class Syntax hints:  Ⅎwnfc 2900  Vcvv 3351   ∪ cun 3721  ∅c0 4063  {csn 4316  ∪ cuni 4574   ↦ cmpt 4863   × cxp 5247  ◡ccnv 5248   ∘ ccom 5253  tpos ctpos 7503 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-sep 4915  ax-nul 4923  ax-pow 4974  ax-pr 5034  ax-un 7096 This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3353  df-sbc 3588  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-nul 4064  df-if 4226  df-pw 4299  df-sn 4317  df-pr 4319  df-op 4323  df-uni 4575  df-br 4787  df-opab 4847  df-mpt 4864  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-fv 6039  df-tpos 7504 This theorem is referenced by: (None)
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