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Theorem fsuppcolem 9160
Description: Lemma for fsuppco 9161. Formula building theorem for finite supports: rearranging the index set. (Contributed by Stefan O'Rear, 21-Mar-2015.)
Hypotheses
Ref Expression
fsuppcolem.f (𝜑 → (𝐹 “ (V ∖ {𝑍})) ∈ Fin)
fsuppcolem.g (𝜑𝐺:𝑋1-1𝑌)
Assertion
Ref Expression
fsuppcolem (𝜑 → ((𝐹𝐺) “ (V ∖ {𝑍})) ∈ Fin)

Proof of Theorem fsuppcolem
StepHypRef Expression
1 cnvco 5794 . . . 4 (𝐹𝐺) = (𝐺𝐹)
21imaeq1i 5966 . . 3 ((𝐹𝐺) “ (V ∖ {𝑍})) = ((𝐺𝐹) “ (V ∖ {𝑍}))
3 imaco 6155 . . 3 ((𝐺𝐹) “ (V ∖ {𝑍})) = (𝐺 “ (𝐹 “ (V ∖ {𝑍})))
42, 3eqtri 2766 . 2 ((𝐹𝐺) “ (V ∖ {𝑍})) = (𝐺 “ (𝐹 “ (V ∖ {𝑍})))
5 fsuppcolem.g . . . 4 (𝜑𝐺:𝑋1-1𝑌)
6 df-f1 6438 . . . . 5 (𝐺:𝑋1-1𝑌 ↔ (𝐺:𝑋𝑌 ∧ Fun 𝐺))
76simprbi 497 . . . 4 (𝐺:𝑋1-1𝑌 → Fun 𝐺)
85, 7syl 17 . . 3 (𝜑 → Fun 𝐺)
9 fsuppcolem.f . . 3 (𝜑 → (𝐹 “ (V ∖ {𝑍})) ∈ Fin)
10 imafi 8958 . . 3 ((Fun 𝐺 ∧ (𝐹 “ (V ∖ {𝑍})) ∈ Fin) → (𝐺 “ (𝐹 “ (V ∖ {𝑍}))) ∈ Fin)
118, 9, 10syl2anc 584 . 2 (𝜑 → (𝐺 “ (𝐹 “ (V ∖ {𝑍}))) ∈ Fin)
124, 11eqeltrid 2843 1 (𝜑 → ((𝐹𝐺) “ (V ∖ {𝑍})) ∈ Fin)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2106  Vcvv 3432  cdif 3884  {csn 4561  ccnv 5588  cima 5592  ccom 5593  Fun wfun 6427  wf 6429  1-1wf1 6430  Fincfn 8733
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pr 5352  ax-un 7588
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-br 5075  df-opab 5137  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-om 7713  df-1o 8297  df-en 8734  df-fin 8737
This theorem is referenced by:  fsuppco  9161
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