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Theorem elsuppfng 8099
Description: An element of the support of a function with a given domain. This version of elsuppfn 8100 assumes 𝐹 is a set rather than its domain 𝑋, avoiding ax-rep 5215. (Contributed by SN, 5-Aug-2024.)
Assertion
Ref Expression
elsuppfng ((𝐹 Fn 𝑋𝐹𝑉𝑍𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ (𝑆𝑋 ∧ (𝐹𝑆) ≠ 𝑍)))

Proof of Theorem elsuppfng
Dummy variable 𝑖 is distinct from all other variables.
StepHypRef Expression
1 suppvalfng 8097 . . 3 ((𝐹 Fn 𝑋𝐹𝑉𝑍𝑊) → (𝐹 supp 𝑍) = {𝑖𝑋 ∣ (𝐹𝑖) ≠ 𝑍})
21eleq2d 2817 . 2 ((𝐹 Fn 𝑋𝐹𝑉𝑍𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ 𝑆 ∈ {𝑖𝑋 ∣ (𝐹𝑖) ≠ 𝑍}))
3 fveq2 6822 . . . 4 (𝑖 = 𝑆 → (𝐹𝑖) = (𝐹𝑆))
43neeq1d 2987 . . 3 (𝑖 = 𝑆 → ((𝐹𝑖) ≠ 𝑍 ↔ (𝐹𝑆) ≠ 𝑍))
54elrab 3642 . 2 (𝑆 ∈ {𝑖𝑋 ∣ (𝐹𝑖) ≠ 𝑍} ↔ (𝑆𝑋 ∧ (𝐹𝑆) ≠ 𝑍))
62, 5bitrdi 287 1 ((𝐹 Fn 𝑋𝐹𝑉𝑍𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ (𝑆𝑋 ∧ (𝐹𝑆) ≠ 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  w3a 1086   = wceq 1541  wcel 2111  wne 2928  {crab 3395   Fn wfn 6476  cfv 6481  (class class class)co 7346   supp csupp 8090
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-sep 5232  ax-nul 5242  ax-pr 5368  ax-un 7668
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-ral 3048  df-rex 3057  df-rab 3396  df-v 3438  df-sbc 3737  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-nul 4281  df-if 4473  df-pw 4549  df-sn 4574  df-pr 4576  df-op 4580  df-uni 4857  df-br 5090  df-opab 5152  df-id 5509  df-xp 5620  df-rel 5621  df-cnv 5622  df-co 5623  df-dm 5624  df-rn 5625  df-res 5626  df-ima 5627  df-iota 6437  df-fun 6483  df-fn 6484  df-fv 6489  df-ov 7349  df-oprab 7350  df-mpo 7351  df-supp 8091
This theorem is referenced by:  suppss  8124  suppssrg  8126  ciclcl  17709  cicrcl  17710  ismhp3  22057  mdegleb  25996  suppiniseg  32667
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