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| Mirrors > Home > MPE Home > Th. List > mapdom3 | Structured version Visualization version GIF version | ||
| Description: Set exponentiation dominates the base. (Contributed by Mario Carneiro, 30-Apr-2015.) (Proof shortened by AV, 17-Jul-2022.) |
| Ref | Expression |
|---|---|
| mapdom3 | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐵 ≠ ∅) → 𝐴 ≼ (𝐴 ↑m 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0 4281 | . . 3 ⊢ (𝐵 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝐵) | |
| 2 | simp1 1142 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ∈ 𝑉) | |
| 3 | simp3 1144 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 4 | 2, 3 | mapsnend 8973 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → (𝐴 ↑m {𝑥}) ≈ 𝐴) |
| 5 | 4 | ensymd 8942 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ≈ (𝐴 ↑m {𝑥})) |
| 6 | simp2 1143 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐵 ∈ 𝑊) | |
| 7 | 3 | snssd 4718 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → {𝑥} ⊆ 𝐵) |
| 8 | ssdomg 8937 | . . . . . . . 8 ⊢ (𝐵 ∈ 𝑊 → ({𝑥} ⊆ 𝐵 → {𝑥} ≼ 𝐵)) | |
| 9 | 6, 7, 8 | sylc 65 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → {𝑥} ≼ 𝐵) |
| 10 | vex 3435 | . . . . . . . . 9 ⊢ 𝑥 ∈ V | |
| 11 | 10 | snnz 4708 | . . . . . . . 8 ⊢ {𝑥} ≠ ∅ |
| 12 | simpl 483 | . . . . . . . . 9 ⊢ (({𝑥} = ∅ ∧ 𝐴 = ∅) → {𝑥} = ∅) | |
| 13 | 12 | necon3ai 2959 | . . . . . . . 8 ⊢ ({𝑥} ≠ ∅ → ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅)) |
| 14 | 11, 13 | ax-mp 5 | . . . . . . 7 ⊢ ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅) |
| 15 | mapdom2 9076 | . . . . . . 7 ⊢ (({𝑥} ≼ 𝐵 ∧ ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅)) → (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) | |
| 16 | 9, 14, 15 | sylancl 592 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) |
| 17 | endomtr 8949 | . . . . . 6 ⊢ ((𝐴 ≈ (𝐴 ↑m {𝑥}) ∧ (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) → 𝐴 ≼ (𝐴 ↑m 𝐵)) | |
| 18 | 5, 16, 17 | syl2anc 590 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ≼ (𝐴 ↑m 𝐵)) |
| 19 | 18 | 3expia 1127 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝑥 ∈ 𝐵 → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
| 20 | 19 | exlimdv 1940 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (∃𝑥 𝑥 ∈ 𝐵 → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
| 21 | 1, 20 | biimtrid 243 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐵 ≠ ∅ → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
| 22 | 21 | 3impia 1123 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐵 ≠ ∅) → 𝐴 ≼ (𝐴 ↑m 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∧ w3a 1092 = wceq 1547 ∃wex 1786 ∈ wcel 2119 ≠ wne 2934 ⊆ wss 3883 ∅c0 4261 {csn 4555 class class class wbr 5072 (class class class)co 7356 ↑m cmap 8763 ≈ cen 8880 ≼ cdom 8881 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-int 4878 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-er 8633 df-map 8765 df-en 8884 df-dom 8885 |
| This theorem is referenced by: infmap2 10130 |
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