| Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > snelmap | Structured version Visualization version GIF version | ||
| Description: Membership of the element in the range of a constant map. (Contributed by Glauco Siliprandi, 3-Mar-2021.) |
| Ref | Expression |
|---|---|
| snelmap.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| snelmap.b | ⊢ (𝜑 → 𝐵 ∈ 𝑊) |
| snelmap.n | ⊢ (𝜑 → 𝐴 ≠ ∅) |
| snelmap.e | ⊢ (𝜑 → (𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴)) |
| Ref | Expression |
|---|---|
| snelmap | ⊢ (𝜑 → 𝑥 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snelmap.n | . . 3 ⊢ (𝜑 → 𝐴 ≠ ∅) | |
| 2 | n0 4303 | . . 3 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑦 𝑦 ∈ 𝐴) | |
| 3 | 1, 2 | sylib 218 | . 2 ⊢ (𝜑 → ∃𝑦 𝑦 ∈ 𝐴) |
| 4 | vex 3440 | . . . . . . . 8 ⊢ 𝑥 ∈ V | |
| 5 | 4 | fvconst2 7138 | . . . . . . 7 ⊢ (𝑦 ∈ 𝐴 → ((𝐴 × {𝑥})‘𝑦) = 𝑥) |
| 6 | 5 | eqcomd 2737 | . . . . . 6 ⊢ (𝑦 ∈ 𝐴 → 𝑥 = ((𝐴 × {𝑥})‘𝑦)) |
| 7 | 6 | adantl 481 | . . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑥 = ((𝐴 × {𝑥})‘𝑦)) |
| 8 | snelmap.e | . . . . . . . 8 ⊢ (𝜑 → (𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴)) | |
| 9 | snelmap.b | . . . . . . . . 9 ⊢ (𝜑 → 𝐵 ∈ 𝑊) | |
| 10 | snelmap.a | . . . . . . . . 9 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 11 | elmapg 8763 | . . . . . . . . 9 ⊢ ((𝐵 ∈ 𝑊 ∧ 𝐴 ∈ 𝑉) → ((𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴) ↔ (𝐴 × {𝑥}):𝐴⟶𝐵)) | |
| 12 | 9, 10, 11 | syl2anc 584 | . . . . . . . 8 ⊢ (𝜑 → ((𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴) ↔ (𝐴 × {𝑥}):𝐴⟶𝐵)) |
| 13 | 8, 12 | mpbid 232 | . . . . . . 7 ⊢ (𝜑 → (𝐴 × {𝑥}):𝐴⟶𝐵) |
| 14 | 13 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → (𝐴 × {𝑥}):𝐴⟶𝐵) |
| 15 | simpr 484 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴) | |
| 16 | 14, 15 | ffvelcdmd 7018 | . . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝐴 × {𝑥})‘𝑦) ∈ 𝐵) |
| 17 | 7, 16 | eqeltrd 2831 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑥 ∈ 𝐵) |
| 18 | 17 | ex 412 | . . 3 ⊢ (𝜑 → (𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐵)) |
| 19 | 18 | exlimdv 1934 | . 2 ⊢ (𝜑 → (∃𝑦 𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐵)) |
| 20 | 3, 19 | mpd 15 | 1 ⊢ (𝜑 → 𝑥 ∈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∃wex 1780 ∈ wcel 2111 ≠ wne 2928 ∅c0 4283 {csn 4576 × cxp 5614 ⟶wf 6477 ‘cfv 6481 (class class class)co 7346 ↑m cmap 8750 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-sbc 3742 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-mpt 5173 df-id 5511 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-fv 6489 df-ov 7349 df-oprab 7350 df-mpo 7351 df-map 8752 |
| This theorem is referenced by: mapssbi 45249 |
| Copyright terms: Public domain | W3C validator |