| Mathbox for Thierry Arnoux |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > indsupp | Structured version Visualization version GIF version | ||
| Description: The support of the indicator function. (Contributed by Thierry Arnoux, 13-Oct-2025.) |
| Ref | Expression |
|---|---|
| indsupp | ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (((𝟭‘𝑂)‘𝐴) supp 0) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 488 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → 𝑂 ∈ 𝑉) | |
| 2 | c0ex 11339 | . . . 4 ⊢ 0 ∈ V | |
| 3 | 2 | a1i 11 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → 0 ∈ V) |
| 4 | indf 12366 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → ((𝟭‘𝑂)‘𝐴):𝑂⟶{0, 1}) | |
| 5 | fsuppeq 8230 | . . . 4 ⊢ ((𝑂 ∈ 𝑉 ∧ 0 ∈ V) → (((𝟭‘𝑂)‘𝐴):𝑂⟶{0, 1} → (((𝟭‘𝑂)‘𝐴) supp 0) = (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0})))) | |
| 6 | 5 | imp 412 | . . 3 ⊢ (((𝑂 ∈ 𝑉 ∧ 0 ∈ V) ∧ ((𝟭‘𝑂)‘𝐴):𝑂⟶{0, 1}) → (((𝟭‘𝑂)‘𝐴) supp 0) = (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0}))) |
| 7 | 1, 3, 4, 6 | syl21anc 851 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (((𝟭‘𝑂)‘𝐴) supp 0) = (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0}))) |
| 8 | prcom 4695 | . . . . . 6 ⊢ {0, 1} = {1, 0} | |
| 9 | 8 | difeq1i 4062 | . . . . 5 ⊢ ({0, 1} ∖ {0}) = ({1, 0} ∖ {0}) |
| 10 | ax-1ne0 11308 | . . . . . 6 ⊢ 1 ≠ 0 | |
| 11 | difprsn2 4766 | . . . . . 6 ⊢ (1 ≠ 0 → ({1, 0} ∖ {0}) = {1}) | |
| 12 | 10, 11 | ax-mp 5 | . . . . 5 ⊢ ({1, 0} ∖ {0}) = {1} |
| 13 | 9, 12 | eqtri 2786 | . . . 4 ⊢ ({0, 1} ∖ {0}) = {1} |
| 14 | 13 | a1i 11 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → ({0, 1} ∖ {0}) = {1}) |
| 15 | 14 | imaeq2d 6070 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0})) = (◡((𝟭‘𝑂)‘𝐴) “ {1})) |
| 16 | indpi1 12374 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (◡((𝟭‘𝑂)‘𝐴) “ {1}) = 𝐴) | |
| 17 | 7, 15, 16 | 3eqtrd 2802 | 1 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (((𝟭‘𝑂)‘𝐴) supp 0) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 Vcvv 3454 ⊆ wss 3900 ∖ cdif 4048 {csn 4588 {cpr 4590 ◡ccnv 5657 “ cima 5661 ⟶wf 6562 ‘cfv 6566 (class class class)co 7451 supp csupp 8214 0cc0 11239 1c1 11240 𝟭cind 12360 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-i2m1 11307 ax-1ne0 11308 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7454 df-oprab 7455 df-mpo 7456 df-supp 8215 df-ind 12361 |
| This theorem is used by: indfsd 33531 elrgspnsubrunlem1 33907 gsumind 34010 mplmulmvr 34282 esplymhp 34311 esplyfv1 34312 esplyfval1 34316 |
| Copyright terms: Public domain | W3C validator |