| Mathbox for Thierry Arnoux |
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| 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 487 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → 𝑂 ∈ 𝑉) | |
| 2 | c0ex 11206 | . . . 4 ⊢ 0 ∈ V | |
| 3 | 2 | a1i 11 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → 0 ∈ V) |
| 4 | indf 12230 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → ((𝟭‘𝑂)‘𝐴):𝑂⟶{0, 1}) | |
| 5 | fsuppeq 8169 | . . . 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 411 | . . 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 850 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (((𝟭‘𝑂)‘𝐴) supp 0) = (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0}))) |
| 8 | prcom 4697 | . . . . . 6 ⊢ {0, 1} = {1, 0} | |
| 9 | 8 | difeq1i 4076 | . . . . 5 ⊢ ({0, 1} ∖ {0}) = ({1, 0} ∖ {0}) |
| 10 | ax-1ne0 11175 | . . . . . 6 ⊢ 1 ≠ 0 | |
| 11 | difprsn2 4768 | . . . . . 6 ⊢ (1 ≠ 0 → ({1, 0} ∖ {0}) = {1}) | |
| 12 | 10, 11 | ax-mp 5 | . . . . 5 ⊢ ({1, 0} ∖ {0}) = {1} |
| 13 | 9, 12 | eqtri 2785 | . . . 4 ⊢ ({0, 1} ∖ {0}) = {1} |
| 14 | 13 | a1i 11 | . . 3 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → ({0, 1} ∖ {0}) = {1}) |
| 15 | 14 | imaeq2d 6061 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (◡((𝟭‘𝑂)‘𝐴) “ ({0, 1} ∖ {0})) = (◡((𝟭‘𝑂)‘𝐴) “ {1})) |
| 16 | indpi1 12238 | . 2 ⊢ ((𝑂 ∈ 𝑉 ∧ 𝐴 ⊆ 𝑂) → (◡((𝟭‘𝑂)‘𝐴) “ {1}) = 𝐴) | |
| 17 | 7, 15, 16 | 3eqtrd 2801 | 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 400 = wceq 1569 ∈ wcel 2142 ≠ wne 2957 Vcvv 3454 ∖ cdif 3901 ⊆ wss 3904 {csn 4588 {cpr 4590 ◡ccnv 5659 “ cima 5663 ⟶wf 6532 ‘cfv 6536 (class class class)co 7412 supp csupp 8154 0cc0 11106 1c1 11107 𝟭cind 12224 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-i2m1 11174 ax-1ne0 11175 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7415 df-oprab 7416 df-mpo 7417 df-supp 8155 df-ind 12225 |
| This theorem is used by: indfsd 33199 elrgspnsubrunlem1 33576 gsumind 33674 mplmulmvr 33938 esplymhp 33967 esplyfv1 33968 esplyfval1 33972 |
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