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Theorem dprdffsupp 19982
Description: A finitely supported function in 𝑆 is a finitely supported function. (Contributed by Mario Carneiro, 25-Apr-2016.) (Revised by AV, 11-Jul-2019.)
Hypotheses
Ref Expression
dprdff.w 𝑊 = {X𝑖𝐼 (𝑆𝑖) ∣ finSupp 0 }
dprdff.1 (𝜑𝐺dom DProd 𝑆)
dprdff.2 (𝜑 → dom 𝑆 = 𝐼)
dprdff.3 (𝜑𝐹𝑊)
Assertion
Ref Expression
dprdffsupp (𝜑𝐹 finSupp 0 )
Distinct variable groups:   ,𝐹   ,𝑖,𝐼   0 ,   𝑆,,𝑖
Allowed substitution hints:   𝜑(,𝑖)   𝐹(𝑖)   𝐺(,𝑖)   𝑊(,𝑖)   0 (𝑖)

Proof of Theorem dprdffsupp
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 dprdff.3 . . 3 (𝜑𝐹𝑊)
2 dprdff.w . . . 4 𝑊 = {X𝑖𝐼 (𝑆𝑖) ∣ finSupp 0 }
3 dprdff.1 . . . 4 (𝜑𝐺dom DProd 𝑆)
4 dprdff.2 . . . 4 (𝜑 → dom 𝑆 = 𝐼)
52, 3, 4dprdw 19978 . . 3 (𝜑 → (𝐹𝑊 ↔ (𝐹 Fn 𝐼 ∧ ∀𝑥𝐼 (𝐹𝑥) ∈ (𝑆𝑥) ∧ 𝐹 finSupp 0 )))
61, 5mpbid 232 . 2 (𝜑 → (𝐹 Fn 𝐼 ∧ ∀𝑥𝐼 (𝐹𝑥) ∈ (𝑆𝑥) ∧ 𝐹 finSupp 0 ))
76simp3d 1145 1 (𝜑𝐹 finSupp 0 )
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1087   = wceq 1542  wcel 2114  wral 3052  {crab 3390   class class class wbr 5086  dom cdm 5624   Fn wfn 6487  cfv 6492  Xcixp 8838   finSupp cfsupp 9267   DProd cdprd 19961
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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5212  ax-sep 5231  ax-nul 5241  ax-pr 5370  ax-un 7682
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3063  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-oprab 7364  df-mpo 7365  df-ixp 8839  df-dprd 19963
This theorem is referenced by:  dprdssv  19984  dprdfinv  19987  dprdfadd  19988  dprdfeq0  19990  dprdlub  19994  dmdprdsplitlem  20005  dpjidcl  20026
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