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Mirrors > Home > MPE Home > Th. List > suppval1 | Structured version Visualization version GIF version |
Description: The value of the operation constructing the support of a function. (Contributed by AV, 6-Apr-2019.) |
Ref | Expression |
---|---|
suppval1 | ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | suppval 7950 | . . 3 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}}) | |
2 | 1 | 3adant1 1128 | . 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}}) |
3 | funfn 6448 | . . . . . . . . 9 ⊢ (Fun 𝑋 ↔ 𝑋 Fn dom 𝑋) | |
4 | 3 | biimpi 215 | . . . . . . . 8 ⊢ (Fun 𝑋 → 𝑋 Fn dom 𝑋) |
5 | 4 | 3ad2ant1 1131 | . . . . . . 7 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → 𝑋 Fn dom 𝑋) |
6 | fnsnfv 6829 | . . . . . . 7 ⊢ ((𝑋 Fn dom 𝑋 ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖})) | |
7 | 5, 6 | sylan 579 | . . . . . 6 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → {(𝑋‘𝑖)} = (𝑋 “ {𝑖})) |
8 | 7 | eqcomd 2744 | . . . . 5 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → (𝑋 “ {𝑖}) = {(𝑋‘𝑖)}) |
9 | 8 | neeq1d 3002 | . . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ {(𝑋‘𝑖)} ≠ {𝑍})) |
10 | fvex 6769 | . . . . . 6 ⊢ (𝑋‘𝑖) ∈ V | |
11 | sneqbg 4771 | . . . . . 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 2987 | . . . 4 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ({(𝑋‘𝑖)} ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍)) |
14 | 9, 13 | bitrd 278 | . . 3 ⊢ (((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) ∧ 𝑖 ∈ dom 𝑋) → ((𝑋 “ {𝑖}) ≠ {𝑍} ↔ (𝑋‘𝑖) ≠ 𝑍)) |
15 | 14 | rabbidva 3402 | . 2 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → {𝑖 ∈ dom 𝑋 ∣ (𝑋 “ {𝑖}) ≠ {𝑍}} = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍}) |
16 | 2, 15 | eqtrd 2778 | 1 ⊢ ((Fun 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑋 supp 𝑍) = {𝑖 ∈ dom 𝑋 ∣ (𝑋‘𝑖) ≠ 𝑍}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 {crab 3067 Vcvv 3422 {csn 4558 dom cdm 5580 “ cima 5583 Fun wfun 6412 Fn wfn 6413 ‘cfv 6418 (class class class)co 7255 supp csupp 7948 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-sbc 3712 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-supp 7949 |
This theorem is referenced by: suppvalfng 7955 suppvalfn 7956 suppfnss 7976 fnsuppres 7978 rmfsupp2 31394 domnmsuppn0 45593 rmsuppss 45594 mndpsuppss 45595 scmsuppss 45596 suppdm 45739 |
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