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Related theorems GIF version |
| Description: The sum of two fractions is greater than one of them. |
| Ref | Expression |
|---|---|
| ltaddpq.1 | ⊢ A ∈ V |
| ltaddpq.2 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| ltaddpq | ⊢ ((A ∈ Q ∧ B ∈ Q) → A <Q (A +Q B)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltaddpq.2 | . . . . . 6 ⊢ B ∈ V | |
| 2 | oprex 3018 | . . . . . 6 ⊢ (B +Q B) ∈ V | |
| 3 | 1, 2 | ltapq 3870 | . . . . 5 ⊢ (A ∈ Q → (B <Q (B +Q B) ↔ (A +Q B) <Q (A +Q (B +Q B)))) |
| 4 | 1lt2pq 3872 | . . . . . . 7 ⊢ 1Q <Q (1Q +Q 1Q) | |
| 5 | 1q 3851 | . . . . . . . . 9 ⊢ 1Q ∈ Q | |
| 6 | 5 | elisseti 1355 | . . . . . . . 8 ⊢ 1Q ∈ V |
| 7 | oprex 3018 | . . . . . . . 8 ⊢ (1Q +Q 1Q) ∈ V | |
| 8 | 6, 7 | ltmpq 3871 | . . . . . . 7 ⊢ (B ∈ Q → (1Q <Q (1Q +Q 1Q) ↔ (B ·Q 1Q) <Q (B ·Q (1Q +Q 1Q)))) |
| 9 | 4, 8 | mpbii 168 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q 1Q) <Q (B ·Q (1Q +Q 1Q))) |
| 10 | mulidpq 3863 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q 1Q) = B) | |
| 11 | 10, 10 | opreq12d 3014 | . . . . . . 7 ⊢ (B ∈ Q → ((B ·Q 1Q) +Q (B ·Q 1Q)) = (B +Q B)) |
| 12 | 6, 6 | distrpq 3861 | . . . . . . 7 ⊢ (B ·Q (1Q +Q 1Q)) = ((B ·Q 1Q) +Q (B ·Q 1Q)) |
| 13 | 11, 12 | syl5eq 1136 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q (1Q +Q 1Q)) = (B +Q B)) |
| 14 | 9, 10, 13 | 3brtr3d 2086 | . . . . 5 ⊢ (B ∈ Q → B <Q (B +Q B)) |
| 15 | 3, 14 | syl5bi 183 | . . . 4 ⊢ (A ∈ Q → (B ∈ Q → (A +Q B) <Q (A +Q (B +Q B)))) |
| 16 | ltaddpq.1 | . . . . . 6 ⊢ A ∈ V | |
| 17 | 1, 16 | addcompq 3856 | . . . . 5 ⊢ (B +Q A) = (A +Q B) |
| 18 | oprex 3018 | . . . . . . 7 ⊢ (A +Q B) ∈ V | |
| 19 | 1, 18 | addcompq 3856 | . . . . . 6 ⊢ (B +Q (A +Q B)) = ((A +Q B) +Q B) |
| 20 | 1, 1 | addasspq 3857 | . . . . . 6 ⊢ ((A +Q B) +Q B) = (A +Q (B +Q B)) |
| 21 | 19, 20 | eqtr 1119 | . . . . 5 ⊢ (B +Q (A +Q B)) = (A +Q (B +Q B)) |
| 22 | 17, 21 | breq12i 2070 | . . . 4 ⊢ ((B +Q A) <Q (B +Q (A +Q B)) ↔ (A +Q B) <Q (A +Q (B +Q B))) |
| 23 | 15, 22 | syl6ibr 186 | . . 3 ⊢ (A ∈ Q → (B ∈ Q → (B +Q A) <Q (B +Q (A +Q B)))) |
| 24 | 23 | imp 277 | . 2 ⊢ ((A ∈ Q ∧ B ∈ Q) → (B +Q A) <Q (B +Q (A +Q B))) |
| 25 | 16, 18 | ltapq 3870 | . . 3 ⊢ (B ∈ Q → (A <Q (A +Q B) ↔ (B +Q A) <Q (B +Q (A +Q B)))) |
| 26 | 25 | adantl 305 | . 2 ⊢ ((A ∈ Q ∧ B ∈ Q) → (A <Q (A +Q B) ↔ (B +Q A) <Q (B +Q (A +Q B)))) |
| 27 | 24, 26 | mpbird 171 | 1 ⊢ ((A ∈ Q ∧ B ∈ Q) → A <Q (A +Q B)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 ∧ wa 196 ∈ wcel 1092 Vcvv 1348 class class class wbr 2054 (class class class)co 3001 Qcnq 3773 1Qc1q 3774 +Q cplq 3775 ·Q cmq 3776 <Q cltq 3778 |
| This theorem is referenced by: ltexpq 3874 nsmallpq 3877 ltbtwnpq 3878 prlem934 3933 ltaddpr 3934 ltexprlem2 3937 ltexprlem4 3939 |
| 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-ltq 3836 df-1q 3837 |