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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 3989 | . . . . . 6 ⊢ (B +Q B) ∈ V | |
| 3 | 1, 2 | ltapq 5088 | . . . . 5 ⊢ (A ∈ Q → (B <Q (B +Q B) ↔ (A +Q B) <Q (A +Q (B +Q B)))) |
| 4 | 1lt2pq 5090 | . . . . . . 7 ⊢ 1Q <Q (1Q +Q 1Q) | |
| 5 | 1q 5069 | . . . . . . . . 9 ⊢ 1Q ∈ Q | |
| 6 | 5 | elisseti 1821 | . . . . . . . 8 ⊢ 1Q ∈ V |
| 7 | oprex 3989 | . . . . . . . 8 ⊢ (1Q +Q 1Q) ∈ V | |
| 8 | 6, 7 | ltmpq 5089 | . . . . . . 7 ⊢ (B ∈ Q → (1Q <Q (1Q +Q 1Q) ↔ (B ·Q 1Q) <Q (B ·Q (1Q +Q 1Q)))) |
| 9 | 4, 8 | mpbii 193 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q 1Q) <Q (B ·Q (1Q +Q 1Q))) |
| 10 | mulidpq 5081 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q 1Q) = B) | |
| 11 | 10, 10 | opreq12d 3984 | . . . . . . 7 ⊢ (B ∈ Q → ((B ·Q 1Q) +Q (B ·Q 1Q)) = (B +Q B)) |
| 12 | 6, 6 | distrpq 5079 | . . . . . . 7 ⊢ (B ·Q (1Q +Q 1Q)) = ((B ·Q 1Q) +Q (B ·Q 1Q)) |
| 13 | 11, 12 | syl5eq 1522 | . . . . . 6 ⊢ (B ∈ Q → (B ·Q (1Q +Q 1Q)) = (B +Q B)) |
| 14 | 9, 10, 13 | 3brtr3d 2649 | . . . . 5 ⊢ (B ∈ Q → B <Q (B +Q B)) |
| 15 | 3, 14 | syl5bi 208 | . . . 4 ⊢ (A ∈ Q → (B ∈ Q → (A +Q B) <Q (A +Q (B +Q B)))) |
| 16 | ltaddpq.1 | . . . . . 6 ⊢ A ∈ V | |
| 17 | 1, 16 | addcompq 5074 | . . . . 5 ⊢ (B +Q A) = (A +Q B) |
| 18 | oprex 3989 | . . . . . . 7 ⊢ (A +Q B) ∈ V | |
| 19 | 1, 18 | addcompq 5074 | . . . . . 6 ⊢ (B +Q (A +Q B)) = ((A +Q B) +Q B) |
| 20 | 1, 1 | addasspq 5075 | . . . . . 6 ⊢ ((A +Q B) +Q B) = (A +Q (B +Q B)) |
| 21 | 19, 20 | eqtr 1498 | . . . . 5 ⊢ (B +Q (A +Q B)) = (A +Q (B +Q B)) |
| 22 | 17, 21 | breq12i 2633 | . . . 4 ⊢ ((B +Q A) <Q (B +Q (A +Q B)) ↔ (A +Q B) <Q (A +Q (B +Q B))) |
| 23 | 15, 22 | syl6ibr 213 | . . 3 ⊢ (A ∈ Q → (B ∈ Q → (B +Q A) <Q (B +Q (A +Q B)))) |
| 24 | 23 | imp 350 | . 2 ⊢ ((A ∈ Q ⋀ B ∈ Q) → (B +Q A) <Q (B +Q (A +Q B))) |
| 25 | 16, 18 | ltapq 5088 | . . 3 ⊢ (B ∈ Q → (A <Q (A +Q B) ↔ (B +Q A) <Q (B +Q (A +Q B)))) |
| 26 | 25 | adantl 390 | . 2 ⊢ ((A ∈ Q ⋀ B ∈ Q) → (A <Q (A +Q B) ↔ (B +Q A) <Q (B +Q (A +Q B)))) |
| 27 | 24, 26 | mpbird 196 | 1 ⊢ ((A ∈ Q ⋀ B ∈ Q) → A <Q (A +Q B)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 146 ⋀ wa 223 ∈ wcel 960 Vcvv 1814 class class class wbr 2624 (class class class)co 3969 Qcnq 4991 1Qc1q 4992 +Q cplq 4993 ·Q cmq 4994 <Q cltq 4996 |
| This theorem is referenced by: ltexpq 5092 nsmallpq 5095 ltbtwnpq 5096 prlem934 5151 ltaddpr 5152 ltexprlem2 5155 ltexprlem4 5157 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-rep 2698 ax-sep 2708 ax-nul 2715 ax-pow 2748 ax-pr 2785 ax-un 2872 ax-inf2 4634 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 778 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-rex 1653 df-reu 1654 df-rab 1655 df-v 1815 df-sbc 1945 df-csb 2005 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-if 2366 df-pw 2406 df-sn 2416 df-pr 2417 df-tp 2419 df-op 2420 df-uni 2508 df-int 2538 df-iun 2572 df-br 2625 df-opab 2672 df-tr 2686 df-eprel 2838 df-id 2841 df-po 2846 df-so 2856 df-fr 2923 df-we 2940 df-ord 2957 df-on 2958 df-lim 2959 df-suc 2960 df-om 3138 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 df-fun 3198 df-fn 3199 df-f 3200 df-fv 3204 df-rdg 3938 df-opr 3971 df-oprab 3972 df-1st 4085 df-2nd 4086 df-1o 4139 df-oadd 4141 df-omul 4142 df-er 4267 df-ec 4269 df-qs 4272 df-ni 5012 df-pli 5013 df-mi 5014 df-lti 5015 df-plpq 5047 df-mpq 5048 df-enq 5049 df-nq 5050 df-plq 5051 df-mq 5052 df-ltq 5054 df-1q 5055 |