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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 4277 | . . 3 ⊢ (𝐵 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝐵) | |
2 | simp1 1134 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ∈ 𝑉) | |
3 | simp3 1136 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
4 | 2, 3 | mapsnend 8780 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → (𝐴 ↑m {𝑥}) ≈ 𝐴) |
5 | 4 | ensymd 8746 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ≈ (𝐴 ↑m {𝑥})) |
6 | simp2 1135 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐵 ∈ 𝑊) | |
7 | 3 | snssd 4739 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → {𝑥} ⊆ 𝐵) |
8 | ssdomg 8741 | . . . . . . . 8 ⊢ (𝐵 ∈ 𝑊 → ({𝑥} ⊆ 𝐵 → {𝑥} ≼ 𝐵)) | |
9 | 6, 7, 8 | sylc 65 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → {𝑥} ≼ 𝐵) |
10 | vex 3426 | . . . . . . . . 9 ⊢ 𝑥 ∈ V | |
11 | 10 | snnz 4709 | . . . . . . . 8 ⊢ {𝑥} ≠ ∅ |
12 | simpl 482 | . . . . . . . . 9 ⊢ (({𝑥} = ∅ ∧ 𝐴 = ∅) → {𝑥} = ∅) | |
13 | 12 | necon3ai 2967 | . . . . . . . 8 ⊢ ({𝑥} ≠ ∅ → ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅)) |
14 | 11, 13 | ax-mp 5 | . . . . . . 7 ⊢ ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅) |
15 | mapdom2 8884 | . . . . . . 7 ⊢ (({𝑥} ≼ 𝐵 ∧ ¬ ({𝑥} = ∅ ∧ 𝐴 = ∅)) → (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) | |
16 | 9, 14, 15 | sylancl 585 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) |
17 | endomtr 8753 | . . . . . 6 ⊢ ((𝐴 ≈ (𝐴 ↑m {𝑥}) ∧ (𝐴 ↑m {𝑥}) ≼ (𝐴 ↑m 𝐵)) → 𝐴 ≼ (𝐴 ↑m 𝐵)) | |
18 | 5, 16, 17 | syl2anc 583 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑥 ∈ 𝐵) → 𝐴 ≼ (𝐴 ↑m 𝐵)) |
19 | 18 | 3expia 1119 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝑥 ∈ 𝐵 → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
20 | 19 | exlimdv 1937 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (∃𝑥 𝑥 ∈ 𝐵 → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
21 | 1, 20 | syl5bi 241 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐵 ≠ ∅ → 𝐴 ≼ (𝐴 ↑m 𝐵))) |
22 | 21 | 3impia 1115 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐵 ≠ ∅) → 𝐴 ≼ (𝐴 ↑m 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∃wex 1783 ∈ wcel 2108 ≠ wne 2942 ⊆ wss 3883 ∅c0 4253 {csn 4558 class class class wbr 5070 (class class class)co 7255 ↑m cmap 8573 ≈ cen 8688 ≼ cdom 8689 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 |
This theorem is referenced by: infmap2 9905 |
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