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Theorem suppval1 7188
 Description: The value of the operation constructing the support of a function. (Contributed by AV, 6-Apr-2019.)
Assertion
Ref Expression
suppval1 ((Fun 𝑋𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋𝑖) ≠ 𝑍})
Distinct variable groups:   𝑖,𝑉   𝑖,𝑊   𝑖,𝑋   𝑖,𝑍

Proof of Theorem suppval1
StepHypRef Expression
1 suppval 7184 . . 3 ((𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
213adant1 1072 . 2 ((Fun 𝑋𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
3 funfn 5833 . . . . . . . . 9 (Fun 𝑋𝑋 Fn dom 𝑋)
43biimpi 205 . . . . . . . 8 (Fun 𝑋𝑋 Fn dom 𝑋)
543ad2ant1 1075 . . . . . . 7 ((Fun 𝑋𝑋𝑉𝑍𝑊) → 𝑋 Fn dom 𝑋)
6 fnsnfv 6168 . . . . . . 7 ((𝑋 Fn dom 𝑋𝑖 ∈ dom 𝑋) → {(𝑋𝑖)} = (𝑋 “ {𝑖}))
75, 6sylan 487 . . . . . 6 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → {(𝑋𝑖)} = (𝑋 “ {𝑖}))
87eqcomd 2616 . . . . 5 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → (𝑋 “ {𝑖}) = {(𝑋𝑖)})
98neeq1d 2841 . . . 4 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ {(𝑋𝑖)} ≠ {𝑍}))
10 fvex 6113 . . . . . 6 (𝑋𝑖) ∈ V
11 sneqbg 4314 . . . . . 6 ((𝑋𝑖) ∈ V → ({(𝑋𝑖)} = {𝑍} ↔ (𝑋𝑖) = 𝑍))
1210, 11mp1i 13 . . . . 5 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋𝑖)} = {𝑍} ↔ (𝑋𝑖) = 𝑍))
1312necon3bid 2826 . . . 4 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋𝑖)} ≠ {𝑍} ↔ (𝑋𝑖) ≠ 𝑍))
149, 13bitrd 267 . . 3 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ (𝑋𝑖) ≠ 𝑍))
1514rabbidva 3163 . 2 ((Fun 𝑋𝑋𝑉𝑍𝑊) → {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}} = {𝑖 ∈ dom 𝑋 ∣ (𝑋𝑖) ≠ 𝑍})
162, 15eqtrd 2644 1 ((Fun 𝑋𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋𝑖) ≠ 𝑍})
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   ≠ wne 2780  {crab 2900  Vcvv 3173  {csn 4125  dom cdm 5038   “ cima 5041  Fun wfun 5798   Fn wfn 5799  ‘cfv 5804  (class class class)co 6549   supp csupp 7182 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pr 4833  ax-un 6847 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-opab 4644  df-id 4953  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-supp 7183 This theorem is referenced by:  suppvalfn  7189  suppfnss  7207  fnsuppres  7209  domnmsuppn0  41944  rmsuppss  41945  mndpsuppss  41946  scmsuppss  41947  suppdm  42094
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