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Mirrors > Home > MPE Home > Th. List > genpdm | Structured version Visualization version GIF version |
Description: Domain of general operation on positive reals. (Contributed by NM, 18-Nov-1995.) (Revised by Mario Carneiro, 17-Nov-2014.) (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 |
---|---|
genpdm | ⊢ dom 𝐹 = (P × P) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elprnq 10678 | . . . . . . . 8 ⊢ ((𝑤 ∈ P ∧ 𝑦 ∈ 𝑤) → 𝑦 ∈ Q) | |
2 | elprnq 10678 | . . . . . . . 8 ⊢ ((𝑣 ∈ P ∧ 𝑧 ∈ 𝑣) → 𝑧 ∈ Q) | |
3 | genp.2 | . . . . . . . . 9 ⊢ ((𝑦 ∈ Q ∧ 𝑧 ∈ Q) → (𝑦𝐺𝑧) ∈ Q) | |
4 | eleq1 2826 | . . . . . . . . 9 ⊢ (𝑥 = (𝑦𝐺𝑧) → (𝑥 ∈ Q ↔ (𝑦𝐺𝑧) ∈ Q)) | |
5 | 3, 4 | syl5ibrcom 246 | . . . . . . . 8 ⊢ ((𝑦 ∈ Q ∧ 𝑧 ∈ Q) → (𝑥 = (𝑦𝐺𝑧) → 𝑥 ∈ Q)) |
6 | 1, 2, 5 | syl2an 595 | . . . . . . 7 ⊢ (((𝑤 ∈ P ∧ 𝑦 ∈ 𝑤) ∧ (𝑣 ∈ P ∧ 𝑧 ∈ 𝑣)) → (𝑥 = (𝑦𝐺𝑧) → 𝑥 ∈ Q)) |
7 | 6 | an4s 656 | . . . . . 6 ⊢ (((𝑤 ∈ P ∧ 𝑣 ∈ P) ∧ (𝑦 ∈ 𝑤 ∧ 𝑧 ∈ 𝑣)) → (𝑥 = (𝑦𝐺𝑧) → 𝑥 ∈ Q)) |
8 | 7 | rexlimdvva 3222 | . . . . 5 ⊢ ((𝑤 ∈ P ∧ 𝑣 ∈ P) → (∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧) → 𝑥 ∈ Q)) |
9 | 8 | abssdv 3998 | . . . 4 ⊢ ((𝑤 ∈ P ∧ 𝑣 ∈ P) → {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ⊆ Q) |
10 | nqex 10610 | . . . 4 ⊢ Q ∈ V | |
11 | ssexg 5242 | . . . 4 ⊢ (({𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ⊆ Q ∧ Q ∈ V) → {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ∈ V) | |
12 | 9, 10, 11 | sylancl 585 | . . 3 ⊢ ((𝑤 ∈ P ∧ 𝑣 ∈ P) → {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ∈ V) |
13 | 12 | rgen2 3126 | . 2 ⊢ ∀𝑤 ∈ P ∀𝑣 ∈ P {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ∈ V |
14 | genp.1 | . . 3 ⊢ 𝐹 = (𝑤 ∈ P, 𝑣 ∈ P ↦ {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)}) | |
15 | 14 | fnmpo 7882 | . 2 ⊢ (∀𝑤 ∈ P ∀𝑣 ∈ P {𝑥 ∣ ∃𝑦 ∈ 𝑤 ∃𝑧 ∈ 𝑣 𝑥 = (𝑦𝐺𝑧)} ∈ V → 𝐹 Fn (P × P)) |
16 | fndm 6520 | . 2 ⊢ (𝐹 Fn (P × P) → dom 𝐹 = (P × P)) | |
17 | 13, 15, 16 | mp2b 10 | 1 ⊢ dom 𝐹 = (P × P) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 {cab 2715 ∀wral 3063 ∃wrex 3064 Vcvv 3422 ⊆ wss 3883 × cxp 5578 dom cdm 5580 Fn wfn 6413 (class class class)co 7255 ∈ cmpo 7257 Qcnq 10539 Pcnp 10546 |
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 ax-inf2 9329 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 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-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 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-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-fv 6426 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-ni 10559 df-nq 10599 df-np 10668 |
This theorem is referenced by: dmplp 10699 dmmp 10700 |
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