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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 9690 | . . . 4 ⊢ (𝐴 ∈ P → 𝐴 ≠ ∅) | |
2 | n0 3890 | . . . 4 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑓 𝑓 ∈ 𝐴) | |
3 | 1, 2 | sylib 207 | . . 3 ⊢ (𝐴 ∈ P → ∃𝑓 𝑓 ∈ 𝐴) |
4 | prn0 9690 | . . . 4 ⊢ (𝐵 ∈ P → 𝐵 ≠ ∅) | |
5 | n0 3890 | . . . 4 ⊢ (𝐵 ≠ ∅ ↔ ∃𝑔 𝑔 ∈ 𝐵) | |
6 | 4, 5 | sylib 207 | . . 3 ⊢ (𝐵 ∈ P → ∃𝑔 𝑔 ∈ 𝐵) |
7 | 3, 6 | anim12i 588 | . 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 9702 | . . . . . . . 8 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ((𝑓 ∈ 𝐴 ∧ 𝑔 ∈ 𝐵) → (𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵))) |
11 | ne0i 3880 | . . . . . . . . 9 ⊢ ((𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵) → (𝐴𝐹𝐵) ≠ ∅) | |
12 | 0pss 3965 | . . . . . . . . 9 ⊢ (∅ ⊊ (𝐴𝐹𝐵) ↔ (𝐴𝐹𝐵) ≠ ∅) | |
13 | 11, 12 | sylibr 223 | . . . . . . . 8 ⊢ ((𝑓𝐺𝑔) ∈ (𝐴𝐹𝐵) → ∅ ⊊ (𝐴𝐹𝐵)) |
14 | 10, 13 | syl6 34 | . . . . . . 7 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → ((𝑓 ∈ 𝐴 ∧ 𝑔 ∈ 𝐵) → ∅ ⊊ (𝐴𝐹𝐵))) |
15 | 14 | expcomd 453 | . . . . . 6 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝑔 ∈ 𝐵 → (𝑓 ∈ 𝐴 → ∅ ⊊ (𝐴𝐹𝐵)))) |
16 | 15 | exlimdv 1848 | . . . . 5 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (∃𝑔 𝑔 ∈ 𝐵 → (𝑓 ∈ 𝐴 → ∅ ⊊ (𝐴𝐹𝐵)))) |
17 | 16 | com23 84 | . . . 4 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝑓 ∈ 𝐴 → (∃𝑔 𝑔 ∈ 𝐵 → ∅ ⊊ (𝐴𝐹𝐵)))) |
18 | 17 | exlimdv 1848 | . . 3 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (∃𝑓 𝑓 ∈ 𝐴 → (∃𝑔 𝑔 ∈ 𝐵 → ∅ ⊊ (𝐴𝐹𝐵)))) |
19 | 18 | impd 446 | . 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 383 = wceq 1475 ∃wex 1695 ∈ wcel 1977 {cab 2596 ≠ wne 2780 ∃wrex 2897 ⊊ wpss 3541 ∅c0 3874 (class class class)co 6549 ↦ cmpt2 6551 Qcnq 9553 Pcnp 9560 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-ni 9573 df-nq 9613 df-np 9682 |
This theorem is referenced by: genpcl 9709 |
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