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Mirrors > Home > MPE Home > Th. List > genpn0 | Structured version Visualization version GIF version |
Description: The result of an operation on positive reals is not empty. (Contributed by NM, 28-Feb-1996.) (Revised by Mario Carneiro, 12-Jun-2013.) (New usage is discouraged.) |
Ref | Expression |
---|---|
genp.1 | ⊢ 𝐹 = (𝑤 ∈ P, 𝑣 ∈ P ↦ {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)}) |
genp.2 | ⊢ ((𝑦 ∈ Q ∧ 𝑧 ∈ Q) → (𝑦𝐺𝑧) ∈ Q) |
Ref | Expression |
---|---|
genpn0 | ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ∅ ⊊ (𝐴𝐹𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prn0 10795 | . . . 4 ⊢ (𝐴 ∈ P → 𝐴 ≠ ∅) | |
2 | n0 4286 | . . . 4 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑓 𝑓 ∈ 𝐴) | |
3 | 1, 2 | sylib 217 | . . 3 ⊢ (𝐴 ∈ P → ∃𝑓 𝑓 ∈ 𝐴) |
4 | prn0 10795 | . . . 4 ⊢ (𝐵 ∈ P → 𝐵 ≠ ∅) | |
5 | n0 4286 | . . . 4 ⊢ (𝐵 ≠ ∅ ↔ ∃𝑔 𝑔 ∈ 𝐵) | |
6 | 4, 5 | sylib 217 | . . 3 ⊢ (𝐵 ∈ P → ∃𝑔 𝑔 ∈ 𝐵) |
7 | 3, 6 | anim12i 614 | . 2 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (∃𝑓 𝑓 ∈ 𝐴 ∧ ∃𝑔 𝑔 ∈ 𝐵)) |
8 | genp.1 | . . . . . . . . 9 ⊢ 𝐹 = (𝑤 ∈ P, 𝑣 ∈ P ↦ {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)}) | |
9 | genp.2 | . . . . . . . . 9 ⊢ ((𝑦 ∈ Q ∧ 𝑧 ∈ Q) → (𝑦𝐺𝑧) ∈ Q) | |
10 | 8, 9 | genpprecl 10807 | . . . . . . . 8 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ((𝑓 ∈ 𝐴 ∧ 𝑔 ∈ 𝐵) → (𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵))) |
11 | ne0i 4274 | . . . . . . . . 9 ⊢ ((𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵) → (𝐴𝐹𝐵) ≠ ∅) | |
12 | 0pss 4384 | . . . . . . . . 9 ⊢ (∅ ⊊ (𝐴𝐹𝐵) ↔ (𝐴𝐹𝐵) ≠ ∅) | |
13 | 11, 12 | sylibr 233 | . . . . . . . 8 ⊢ ((𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵) → ∅ ⊊ (𝐴𝐹𝐵)) |
14 | 10, 13 | syl6 35 | . . . . . . 7 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ((𝑓 ∈ 𝐴 ∧ 𝑔 ∈ 𝐵) → ∅ ⊊ (𝐴𝐹𝐵))) |
15 | 14 | expcomd 418 | . . . . . 6 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝑔 ∈ 𝐵 → (𝑓 ∈ 𝐴 → ∅ ⊊ (𝐴𝐹𝐵)))) |
16 | 15 | exlimdv 1934 | . . . . 5 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (∃𝑔 𝑔 ∈ 𝐵 → (𝑓 ∈ 𝐴 → ∅ ⊊ (𝐴𝐹𝐵)))) |
17 | 16 | com23 86 | . . . 4 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝑓 ∈ 𝐴 → (∃𝑔 𝑔 ∈ 𝐵 → ∅ ⊊ (𝐴𝐹𝐵)))) |
18 | 17 | exlimdv 1934 | . . 3 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (∃𝑓 𝑓 ∈ 𝐴 → (∃𝑔 𝑔 ∈ 𝐵 → ∅ ⊊ (𝐴𝐹𝐵)))) |
19 | 18 | impd 412 | . 2 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ((∃𝑓 𝑓 ∈ 𝐴 ∧ ∃𝑔 𝑔 ∈ 𝐵) → ∅ ⊊ (𝐴𝐹𝐵))) |
20 | 7, 19 | mpd 15 | 1 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ∅ ⊊ (𝐴𝐹𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1539 ∃wex 1779 ∈ wcel 2104 {cab 2713 ≠ wne 2941 ∃wrex 3071 ⊊ wpss 3893 ∅c0 4262 (class class class)co 7307 ∈ cmpo 7309 Qcnq 10658 Pcnp 10665 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-inf2 9447 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3306 df-v 3439 df-sbc 3722 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-br 5082 df-opab 5144 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-ni 10678 df-nq 10718 df-np 10787 |
This theorem is referenced by: genpcl 10814 |
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