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Theorem isfsupp 8821
Description: The property of a class to be a finitely supported function (in relation to a given zero). (Contributed by AV, 23-May-2019.)
Assertion
Ref Expression
isfsupp ((𝑅𝑉𝑍𝑊) → (𝑅 finSupp 𝑍 ↔ (Fun 𝑅 ∧ (𝑅 supp 𝑍) ∈ Fin)))

Proof of Theorem isfsupp
Dummy variables 𝑟 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 funeq 6344 . . . 4 (𝑟 = 𝑅 → (Fun 𝑟 ↔ Fun 𝑅))
21adantr 484 . . 3 ((𝑟 = 𝑅𝑧 = 𝑍) → (Fun 𝑟 ↔ Fun 𝑅))
3 oveq12 7144 . . . 4 ((𝑟 = 𝑅𝑧 = 𝑍) → (𝑟 supp 𝑧) = (𝑅 supp 𝑍))
43eleq1d 2874 . . 3 ((𝑟 = 𝑅𝑧 = 𝑍) → ((𝑟 supp 𝑧) ∈ Fin ↔ (𝑅 supp 𝑍) ∈ Fin))
52, 4anbi12d 633 . 2 ((𝑟 = 𝑅𝑧 = 𝑍) → ((Fun 𝑟 ∧ (𝑟 supp 𝑧) ∈ Fin) ↔ (Fun 𝑅 ∧ (𝑅 supp 𝑍) ∈ Fin)))
6 df-fsupp 8818 . 2 finSupp = {⟨𝑟, 𝑧⟩ ∣ (Fun 𝑟 ∧ (𝑟 supp 𝑧) ∈ Fin)}
75, 6brabga 5386 1 ((𝑅𝑉𝑍𝑊) → (𝑅 finSupp 𝑍 ↔ (Fun 𝑅 ∧ (𝑅 supp 𝑍) ∈ Fin)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wa 399   = wceq 1538  wcel 2111   class class class wbr 5030  Fun wfun 6318  (class class class)co 7135   supp csupp 7813  Fincfn 8492   finSupp cfsupp 8817
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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pr 5295
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-v 3443  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4801  df-br 5031  df-opab 5093  df-rel 5526  df-cnv 5527  df-co 5528  df-iota 6283  df-fun 6326  df-fv 6332  df-ov 7138  df-fsupp 8818
This theorem is referenced by:  funisfsupp  8822  fsuppimp  8823  fdmfifsupp  8827  fczfsuppd  8835  fsuppmptif  8847  fsuppco2  8850  fsuppcor  8851  gsumzadd  19035  gsumpt  19075  gsum2dlem2  19084  gsum2d  19085  gsum2d2lem  19086  rmfsupp2  30917  elrspunidl  31014  rmfsupp  44774  mndpfsupp  44776  scmfsupp  44778  mptcfsupp  44780
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