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| 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 4308 | . . 3 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑦 𝑦 ∈ 𝐴) | |
| 3 | 1, 2 | sylib 221 | . 2 ⊢ (𝜑 → ∃𝑦 𝑦 ∈ 𝐴) |
| 4 | vex 3459 | . . . . . . . 8 ⊢ 𝑥 ∈ V | |
| 5 | 4 | fvconst2 7204 | . . . . . . 7 ⊢ (𝑦 ∈ 𝐴 → ((𝐴 × {𝑥})‘𝑦) = 𝑥) |
| 6 | 5 | eqcomd 2769 | . . . . . 6 ⊢ (𝑦 ∈ 𝐴 → 𝑥 = ((𝐴 × {𝑥})‘𝑦)) |
| 7 | 6 | adantl 486 | . . . . 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 8837 | . . . . . . . . 9 ⊢ ((𝐵 ∈ 𝑊 ∧ 𝐴 ∈ 𝑉) → ((𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴) ↔ (𝐴 × {𝑥}):𝐴⟶𝐵)) | |
| 12 | 9, 10, 11 | syl2anc 595 | . . . . . . . 8 ⊢ (𝜑 → ((𝐴 × {𝑥}) ∈ (𝐵 ↑m 𝐴) ↔ (𝐴 × {𝑥}):𝐴⟶𝐵)) |
| 13 | 8, 12 | mpbid 235 | . . . . . . 7 ⊢ (𝜑 → (𝐴 × {𝑥}):𝐴⟶𝐵) |
| 14 | 13 | adantr 485 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → (𝐴 × {𝑥}):𝐴⟶𝐵) |
| 15 | simpr 489 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴) | |
| 16 | 14, 15 | ffvelcdmd 7082 | . . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝐴 × {𝑥})‘𝑦) ∈ 𝐵) |
| 17 | 7, 16 | eqeltrd 2863 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑥 ∈ 𝐵) |
| 18 | 17 | ex 417 | . . 3 ⊢ (𝜑 → (𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐵)) |
| 19 | 18 | exlimdv 1963 | . 2 ⊢ (𝜑 → (∃𝑦 𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐵)) |
| 20 | 3, 19 | mpd 16 | 1 ⊢ (𝜑 → 𝑥 ∈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∃wex 1809 ∈ wcel 2143 ≠ wne 2958 ∅c0 4287 {csn 4590 × cxp 5661 ⟶wf 6534 ‘cfv 6538 (class class class)co 7412 ↑m cmap 8825 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3746 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-fv 6546 df-ov 7415 df-oprab 7416 df-mpo 7417 df-map 8827 |
| This theorem is referenced by: mapssbi 45909 |
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