Theorem suppval1 7301

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 7297	. . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
2	1	3adant1 1079	. 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}})
3		funfn 5918	. . . . . . . . 9 ⊢ (Fun 𝑋 ↔ 𝑋 Fn dom 𝑋)
4	3	biimpi 206	. . . . . . . 8 ⊢ (Fun 𝑋 → 𝑋 Fn dom 𝑋)
5	4	3ad2ant1 1082	. . . . . . 7 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → 𝑋 Fn dom 𝑋)
6		fnsnfv 6258	. . . . . . 7 ⊢ ((𝑋 Fn dom 𝑋 ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖}))
7	5, 6	sylan 488	. . . . . 6 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖}))
8	7	eqcomd 2628	. . . . 5 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → (𝑋 “ {𝑖}) = {(𝑋‘𝑖)})
9	8	neeq1d 2853	. . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ {(𝑋‘𝑖)} ≠ {𝑍}))
10		fvex 6201	. . . . . 6 ⊢ (𝑋‘𝑖) ∈ V
11		sneqbg 4374	. . . . . 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 2838	. . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋‘𝑖)} ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍))
14	9, 13	bitrd 268	. . 3 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍))
15	14	rabbidva 3188	. 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}} = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍})
16	2, 15	eqtrd 2656	1 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍})

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   ≠ wne 2794  {crab 2916  Vcvv 3200  {csn 4177  dom cdm 5114   “ cima 5117  Fun wfun 5882   Fn wfn 5883  ‘cfv 5888  (class class class)co 6650   supp csupp 7295

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-opab 4713  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-supp 7296

This theorem is referenced by:  suppvalfn  7302  suppfnss  7320  fnsuppres  7322  domnmsuppn0  42150  rmsuppss  42151  mndpsuppss  42152  scmsuppss  42153  suppdm  42300