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Related theorems GIF version |
| Description: The result of an operation on positive reals is a subset of the positive fractions. |
| Ref | Expression |
|---|---|
| genp.1 | ⊢ F = {〈〈w, v〉, u〉∣((w ∈ P ∧ v ∈ P) ∧ u = {x∣∃y ∈ w ∃z ∈ v x = (yGz)})} |
| genpss.2 | ⊢ ((g ∈ Q ∧ h ∈ Q) → (gGh) ∈ Q) |
| Ref | Expression |
|---|---|
| genpss | ⊢ ((A ∈ P ∧ B ∈ P) → (AFB) ⊆ Q) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | genp.1 | . . . . 5 ⊢ F = {〈〈w, v〉, u〉∣((w ∈ P ∧ v ∈ P) ∧ u = {x∣∃y ∈ w ∃z ∈ v x = (yGz)})} | |
| 2 | 1 | genpv 3896 | . . . 4 ⊢ ((A ∈ P ∧ B ∈ P) → (AFB) = {f∣∃g∃h((g ∈ A ∧ h ∈ B) ∧ f = (gGh))}) |
| 3 | 2 | cleqabd 1178 | . . 3 ⊢ ((A ∈ P ∧ B ∈ P) → (f ∈ (AFB) ↔ ∃g∃h((g ∈ A ∧ h ∈ B) ∧ f = (gGh)))) |
| 4 | prpssnq 3888 | . . . . . . . . . 10 ⊢ (A ∈ P → A ⊂ Q) | |
| 5 | 4 | pssssd 1568 | . . . . . . . . 9 ⊢ (A ∈ P → A ⊆ Q) |
| 6 | 5 | sseld 1506 | . . . . . . . 8 ⊢ (A ∈ P → (g ∈ A → g ∈ Q)) |
| 7 | prpssnq 3888 | . . . . . . . . . 10 ⊢ (B ∈ P → B ⊂ Q) | |
| 8 | 7 | pssssd 1568 | . . . . . . . . 9 ⊢ (B ∈ P → B ⊆ Q) |
| 9 | 8 | sseld 1506 | . . . . . . . 8 ⊢ (B ∈ P → (h ∈ B → h ∈ Q)) |
| 10 | 6, 9 | im2anan9 434 | . . . . . . 7 ⊢ ((A ∈ P ∧ B ∈ P) → ((g ∈ A ∧ h ∈ B) → (g ∈ Q ∧ h ∈ Q))) |
| 11 | genpss.2 | . . . . . . 7 ⊢ ((g ∈ Q ∧ h ∈ Q) → (gGh) ∈ Q) | |
| 12 | 10, 11 | syl6 23 | . . . . . 6 ⊢ ((A ∈ P ∧ B ∈ P) → ((g ∈ A ∧ h ∈ B) → (gGh) ∈ Q)) |
| 13 | eleq1a 1158 | . . . . . 6 ⊢ ((gGh) ∈ Q → (f = (gGh) → f ∈ Q)) | |
| 14 | 12, 13 | syl6 23 | . . . . 5 ⊢ ((A ∈ P ∧ B ∈ P) → ((g ∈ A ∧ h ∈ B) → (f = (gGh) → f ∈ Q))) |
| 15 | 14 | imp3a 279 | . . . 4 ⊢ ((A ∈ P ∧ B ∈ P) → (((g ∈ A ∧ h ∈ B) ∧ f = (gGh)) → f ∈ Q)) |
| 16 | 15 | 19.23advv 955 | . . 3 ⊢ ((A ∈ P ∧ B ∈ P) → (∃g∃h((g ∈ A ∧ h ∈ B) ∧ f = (gGh)) → f ∈ Q)) |
| 17 | 3, 16 | sylbid 178 | . 2 ⊢ ((A ∈ P ∧ B ∈ P) → (f ∈ (AFB) → f ∈ Q)) |
| 18 | 17 | ssrdv 1509 | 1 ⊢ ((A ∈ P ∧ B ∈ P) → (AFB) ⊆ Q) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∃wex 678 {cab 1090 = wceq 1091 ∈ wcel 1092 ∃wrex 1202 ⊆ wss 1487 (class class class)co 3001 {copab2 3002 Qcnq 3773 Pcnp 3779 |
| This theorem is referenced by: genpcl 3905 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 ax-reg 1078 ax-inf 1079 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ne 1192 df-ral 1205 df-rex 1206 df-rab 1208 df-v 1349 df-sbc 1441 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-pss 1494 df-nul 1708 df-if 1777 df-pw 1799 df-sn 1811 df-pr 1812 df-tp 1814 df-op 1815 df-uni 1920 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-id 2125 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-lim 2204 df-suc 2205 df-om 2373 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-f1 2435 df-fv 2438 df-rdg 2970 df-opr 3003 df-oprab 3004 df-qs 3205 df-ni 3794 df-nq 3832 df-np 3880 |