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| Mirrors > Home > MPE Home > Th. List > recclnq | Structured version Visualization version GIF version | ||
| Description: Closure law for positive fraction reciprocal. (Contributed by NM, 6-Mar-1996.) (Revised by Mario Carneiro, 8-May-2013.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| recclnq | ⊢ (𝐴 ∈ Q → (*Q‘𝐴) ∈ Q) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | recidnq 11057 | . . . 4 ⊢ (𝐴 ∈ Q → (𝐴 ·Q (*Q‘𝐴)) = 1Q) | |
| 2 | 1nq 11020 | . . . 4 ⊢ 1Q ∈ Q | |
| 3 | 1, 2 | eqeltrdi 2868 | . . 3 ⊢ (𝐴 ∈ Q → (𝐴 ·Q (*Q‘𝐴)) ∈ Q) |
| 4 | mulnqf 11041 | . . . . 5 ⊢ ·Q :(Q × Q)⟶Q | |
| 5 | 4 | fdmi 6726 | . . . 4 ⊢ dom ·Q = (Q × Q) |
| 6 | 0nnq 11016 | . . . 4 ⊢ ¬ ∅ ∈ Q | |
| 7 | 5, 6 | ndmovrcl 7611 | . . 3 ⊢ ((𝐴 ·Q (*Q‘𝐴)) ∈ Q → (𝐴 ∈ Q ∧ (*Q‘𝐴) ∈ Q)) |
| 8 | 3, 7 | syl 18 | . 2 ⊢ (𝐴 ∈ Q → (𝐴 ∈ Q ∧ (*Q‘𝐴) ∈ Q)) |
| 9 | 8 | simprd 501 | 1 ⊢ (𝐴 ∈ Q → (*Q‘𝐴) ∈ Q) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2144 × cxp 5649 ‘cfv 6543 (class class class)co 7424 Qcnq 10944 1Qc1q 10945 ·Q cmq 10948 *Qcrq 10949 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-1st 8005 df-2nd 8006 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-rdg 8426 df-1o 8484 df-oadd 8488 df-omul 8489 df-er 8725 df-ni 10964 df-mi 10966 df-lti 10967 df-mpq 11001 df-enq 11003 df-nq 11004 df-erq 11005 df-mq 11007 df-1nq 11008 df-rq 11009 |
| This theorem is used by: recrecnq 11059 dmrecnq 11060 halfnq 11068 ltrnq 11071 mulclprlem 11111 prlem934 11125 prlem936 11139 reclem2pr 11140 reclem3pr 11141 reclem4pr 11142 |
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