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Theorem suppval1 7451
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 7447 . . 3 ((𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
213adant1 1123 . 2 ((Fun 𝑋𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
3 funfn 6061 . . . . . . . . 9 (Fun 𝑋𝑋 Fn dom 𝑋)
43biimpi 206 . . . . . . . 8 (Fun 𝑋𝑋 Fn dom 𝑋)
543ad2ant1 1126 . . . . . . 7 ((Fun 𝑋𝑋𝑉𝑍𝑊) → 𝑋 Fn dom 𝑋)
6 fnsnfv 6400 . . . . . . 7 ((𝑋 Fn dom 𝑋𝑖 ∈ dom 𝑋) → {(𝑋𝑖)} = (𝑋 “ {𝑖}))
75, 6sylan 561 . . . . . 6 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → {(𝑋𝑖)} = (𝑋 “ {𝑖}))
87eqcomd 2776 . . . . 5 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → (𝑋 “ {𝑖}) = {(𝑋𝑖)})
98neeq1d 3001 . . . 4 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ {(𝑋𝑖)} ≠ {𝑍}))
10 fvex 6342 . . . . . 6 (𝑋𝑖) ∈ V
11 sneqbg 4504 . . . . . 6 ((𝑋𝑖) ∈ V → ({(𝑋𝑖)} = {𝑍} ↔ (𝑋𝑖) = 𝑍))
1210, 11mp1i 13 . . . . 5 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋𝑖)} = {𝑍} ↔ (𝑋𝑖) = 𝑍))
1312necon3bid 2986 . . . 4 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋𝑖)} ≠ {𝑍} ↔ (𝑋𝑖) ≠ 𝑍))
149, 13bitrd 268 . . 3 (((Fun 𝑋𝑋𝑉𝑍𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ (𝑋𝑖) ≠ 𝑍))
1514rabbidva 3337 . 2 ((Fun 𝑋𝑋𝑉𝑍𝑊) → {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}} = {𝑖 ∈ dom 𝑋 ∣ (𝑋𝑖) ≠ 𝑍})
162, 15eqtrd 2804 1 ((Fun 𝑋𝑋𝑉𝑍𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋𝑖) ≠ 𝑍})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 382  w3a 1070   = wceq 1630  wcel 2144  wne 2942  {crab 3064  Vcvv 3349  {csn 4314  dom cdm 5249  cima 5252  Fun wfun 6025   Fn wfn 6026  cfv 6031  (class class class)co 6792   supp csupp 7445
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-sep 4912  ax-nul 4920  ax-pr 5034  ax-un 7095
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-ral 3065  df-rex 3066  df-rab 3069  df-v 3351  df-sbc 3586  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-sn 4315  df-pr 4317  df-op 4321  df-uni 4573  df-br 4785  df-opab 4845  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-fv 6039  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-supp 7446
This theorem is referenced by:  suppvalfn  7452  suppfnss  7470  suppfnssOLD  7471  fnsuppres  7473  domnmsuppn0  42668  rmsuppss  42669  mndpsuppss  42670  scmsuppss  42671  suppdm  42818
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