| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > suppsssn | Structured version Visualization version GIF version | ||
| Description: Show that the support of a function is a subset of a singleton. (Contributed by AV, 21-Jul-2019.) |
| Ref | Expression |
|---|---|
| suppsssn.n | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴 ∧ 𝑘 ≠ 𝑊) → 𝐵 = 𝑍) |
| suppsssn.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| suppsssn | ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ 𝐵) supp 𝑍) ⊆ {𝑊}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldifsn 4752 | . . 3 ⊢ (𝑘 ∈ (𝐴 ∖ {𝑊}) ↔ (𝑘 ∈ 𝐴 ∧ 𝑘 ≠ 𝑊)) | |
| 2 | suppsssn.n | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴 ∧ 𝑘 ≠ 𝑊) → 𝐵 = 𝑍) | |
| 3 | 2 | 3expb 1137 | . . 3 ⊢ ((𝜑 ∧ (𝑘 ∈ 𝐴 ∧ 𝑘 ≠ 𝑊)) → 𝐵 = 𝑍) |
| 4 | 1, 3 | sylan2b 605 | . 2 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑊})) → 𝐵 = 𝑍) |
| 5 | suppsssn.a | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 6 | 4, 5 | suppss2 8194 | 1 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ 𝐵) supp 𝑍) ⊆ {𝑊}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 400 ∧ w3a 1102 = wceq 1569 ∈ wcel 2142 ≠ wne 2957 ∖ cdif 3901 ⊆ wss 3904 {csn 4588 ↦ cmpt 5191 (class class class)co 7412 supp csupp 8154 |
| 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-pr 5403 ax-un 7734 |
| 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 |
| This theorem is used by: uvcresum 21954 mamulid 22609 mamurid 22610 |
| Copyright terms: Public domain | W3C validator |