Theorem suppval1 7536

Description: The value of the operation constructing the support of a function. (Contributed by AV, 6-Apr-2019.)

Assertion

Ref	Expression
suppval1	⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍})

Distinct variable groups:   𝑖,𝑉   𝑖,𝑊   𝑖,𝑋   𝑖,𝑍

Proof of Theorem suppval1

Step	Hyp	Ref	Expression
1		suppval 7532	. . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
2	1	3adant1 1161	. 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
3		funfn 6129	. . . . . . . . 9 ⊢ (Fun 𝑋 ↔ 𝑋 Fn dom 𝑋)
4	3	biimpi 208	. . . . . . . 8 ⊢ (Fun 𝑋 → 𝑋 Fn dom 𝑋)
5	4	3ad2ant1 1164	. . . . . . 7 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → 𝑋 Fn dom 𝑋)
6		fnsnfv 6481	. . . . . . 7 ⊢ ((𝑋 Fn dom 𝑋 ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖}))
7	5, 6	sylan 576	. . . . . 6 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖}))
8	7	eqcomd 2803	. . . . 5 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → (𝑋 “ {𝑖}) = {(𝑋‘𝑖)})
9	8	neeq1d 3028	. . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ {(𝑋‘𝑖)} ≠ {𝑍}))
10		fvex 6422	. . . . . 6 ⊢ (𝑋‘𝑖) ∈ V
11		sneqbg 4558	. . . . . 6 ⊢ ((𝑋‘𝑖) ∈ V → ({(𝑋‘𝑖)} = {𝑍} ↔ (𝑋‘𝑖) = 𝑍))
12	10, 11	mp1i 13	. . . . 5 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋‘𝑖)} = {𝑍} ↔ (𝑋‘𝑖) = 𝑍))
13	12	necon3bid 3013	. . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋‘𝑖)} ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍))
14	9, 13	bitrd 271	. . 3 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍))
15	14	rabbidva 3370	. 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}} = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍})
16	2, 15	eqtrd 2831	1 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍})

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 385   ∧ w3a 1108   = wceq 1653   ∈ wcel 2157   ≠ wne 2969  {crab 3091  Vcvv 3383  {csn 4366  dom cdm 5310   “ cima 5313  Fun wfun 6093   Fn wfn 6094  ‘cfv 6099  (class class class)co 6876   supp csupp 7530

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2354  ax-ext 2775  ax-sep 4973  ax-nul 4981  ax-pr 5095  ax-un 7181

This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2590  df-eu 2607  df-clab 2784  df-cleq 2790  df-clel 2793  df-nfc 2928  df-ne 2970  df-ral 3092  df-rex 3093  df-rab 3096  df-v 3385  df-sbc 3632  df-dif 3770  df-un 3772  df-in 3774  df-ss 3781  df-nul 4114  df-if 4276  df-sn 4367  df-pr 4369  df-op 4373  df-uni 4627  df-br 4842  df-opab 4904  df-id 5218  df-xp 5316  df-rel 5317  df-cnv 5318  df-co 5319  df-dm 5320  df-rn 5321  df-res 5322  df-ima 5323  df-iota 6062  df-fun 6101  df-fn 6102  df-fv 6107  df-ov 6879  df-oprab 6880  df-mpt2 6881  df-supp 7531

This theorem is referenced by:  suppvalfn  7537  suppfnss  7555  suppfnssOLD  7556  fnsuppres  7558  domnmsuppn0  42937  rmsuppss  42938  mndpsuppss  42939  scmsuppss  42940  suppdm  43087