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Related theorems GIF version |
| Description: Lemma for Proposition 9-3.5(v) of [Gleason] p. 123. |
| Ref | Expression |
|---|---|
| ltaprlem.1 | ⊢ A ∈ V |
| ltaprlem.2 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| ltaprlem | ⊢ (C ∈ P → (A<P B → (C +P A)<P (C +P B))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltaprlem.2 | . . . . . 6 ⊢ B ∈ V | |
| 2 | 1 | ltexpri 3943 | . . . . 5 ⊢ (A<P B → ∃x(x ∈ P ∧ (A +P x) = B)) |
| 3 | opreq2 3007 | . . . . . . . . . . . . 13 ⊢ ((A +P x) = B → (C +P (A +P x)) = (C +P B)) | |
| 4 | ltaprlem.1 | . . . . . . . . . . . . . 14 ⊢ A ∈ V | |
| 5 | visset 1350 | . . . . . . . . . . . . . 14 ⊢ x ∈ V | |
| 6 | 4, 5 | addasspr 3918 | . . . . . . . . . . . . 13 ⊢ ((C +P A) +P x) = (C +P (A +P x)) |
| 7 | 3, 6 | syl5eq 1136 | . . . . . . . . . . . 12 ⊢ ((A +P x) = B → ((C +P A) +P x) = (C +P B)) |
| 8 | 7 | breq2d 2072 | . . . . . . . . . . 11 ⊢ ((A +P x) = B → ((C +P A)<P ((C +P A) +P x) ↔ (C +P A)<P (C +P B))) |
| 9 | ltaddpr 3934 | . . . . . . . . . . 11 ⊢ (((C +P A) ∈ P ∧ x ∈ P) → (C +P A)<P ((C +P A) +P x)) | |
| 10 | 8, 9 | syl5bi 183 | . . . . . . . . . 10 ⊢ ((A +P x) = B → (((C +P A) ∈ P ∧ x ∈ P) → (C +P A)<P (C +P B))) |
| 11 | 10 | exp3a 292 | . . . . . . . . 9 ⊢ ((A +P x) = B → ((C +P A) ∈ P → (x ∈ P → (C +P A)<P (C +P B)))) |
| 12 | addclpr 3914 | . . . . . . . . 9 ⊢ ((C ∈ P ∧ A ∈ P) → (C +P A) ∈ P) | |
| 13 | 11, 12 | syl5 22 | . . . . . . . 8 ⊢ ((A +P x) = B → ((C ∈ P ∧ A ∈ P) → (x ∈ P → (C +P A)<P (C +P B)))) |
| 14 | 13 | com3r 35 | . . . . . . 7 ⊢ (x ∈ P → ((A +P x) = B → ((C ∈ P ∧ A ∈ P) → (C +P A)<P (C +P B)))) |
| 15 | 14 | imp 277 | . . . . . 6 ⊢ ((x ∈ P ∧ (A +P x) = B) → ((C ∈ P ∧ A ∈ P) → (C +P A)<P (C +P B))) |
| 16 | 15 | 19.23aiv 952 | . . . . 5 ⊢ (∃x(x ∈ P ∧ (A +P x) = B) → ((C ∈ P ∧ A ∈ P) → (C +P A)<P (C +P B))) |
| 17 | 2, 16 | syl 12 | . . . 4 ⊢ (A<P B → ((C ∈ P ∧ A ∈ P) → (C +P A)<P (C +P B))) |
| 18 | ltrelpr 3895 | . . . . . 6 ⊢ <P ⊆ (P × P) | |
| 19 | 1, 18 | brel 2459 | . . . . 5 ⊢ (A<P B → (A ∈ P ∧ B ∈ P)) |
| 20 | 19 | pm3.26d 258 | . . . 4 ⊢ (A<P B → A ∈ P) |
| 21 | 17, 20 | sylan2i 357 | . . 3 ⊢ (A<P B → ((C ∈ P ∧ A<P B) → (C +P A)<P (C +P B))) |
| 22 | 21 | exp3a 292 | . 2 ⊢ (A<P B → (C ∈ P → (A<P B → (C +P A)<P (C +P B)))) |
| 23 | 22 | pm2.43b 61 | 1 ⊢ (C ∈ P → (A<P B → (C +P A)<P (C +P B))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∃wex 678 = wceq 1091 ∈ wcel 1092 Vcvv 1348 class class class wbr 2054 (class class class)co 3001 Pcnp 3779 +P cpp 3781 <P cltp 3783 |
| This theorem is referenced by: ltapr 3945 |
| 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-reu 1207 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-int 1966 df-iun 1996 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-1o 3104 df-oadd 3106 df-omul 3107 df-er 3200 df-ec 3202 df-qs 3205 df-ni 3794 df-pli 3795 df-mi 3796 df-lti 3797 df-plpq 3829 df-mpq 3830 df-enq 3831 df-nq 3832 df-plq 3833 df-mq 3834 df-rq 3835 df-ltq 3836 df-1q 3837 df-np 3880 df-plp 3882 df-ltp 3884 |