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Related theorems GIF version |
| Description: A positive fraction times its reciprocal is 1. |
| Ref | Expression |
|---|---|
| recidpq | ⊢ (A ∈ Q → (A ·Q (*Q ‘A)) = 1Q) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cleqid 1102 | . 2 ⊢ (*Q ‘A) = (*Q ‘A) | |
| 2 | fvex 2838 | . . 3 ⊢ (*Q ‘A) ∈ V | |
| 3 | 2 | recmulpq 3864 | . 2 ⊢ (A ∈ Q → ((*Q ‘A) = (*Q ‘A) ↔ (A ·Q (*Q ‘A)) = 1Q)) |
| 4 | 1, 3 | mpbii 168 | 1 ⊢ (A ∈ Q → (A ·Q (*Q ‘A)) = 1Q) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 = wceq 1091 ∈ wcel 1092 ‘cfv 2422 (class class class)co 3001 Qcnq 3773 1Qc1q 3774 ·Q cmq 3776 *Qcrq 3777 |
| This theorem is referenced by: recclpq 3866 recrecpq 3867 dmrecpq 3868 ltrpq 3879 1pr 3911 addclprlem1 3912 addclprlem2 3913 mulclprlem 3915 1idpr 3927 prlem936a 3947 prlem936 3949 reclem3pr 3952 reclem4pr 3953 |
| 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-mi 3796 df-mpq 3830 df-enq 3831 df-nq 3832 df-mq 3834 df-rq 3835 df-1q 3837 |