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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 10652 | . . . 4 ⊢ (𝐴 ∈ Q → (𝐴 ·Q (*Q‘𝐴)) = 1Q) | |
2 | 1nq 10615 | . . . 4 ⊢ 1Q ∈ Q | |
3 | 1, 2 | eqeltrdi 2847 | . . 3 ⊢ (𝐴 ∈ Q → (𝐴 ·Q (*Q‘𝐴)) ∈ Q) |
4 | mulnqf 10636 | . . . . 5 ⊢ ·Q :(Q × Q)⟶Q | |
5 | 4 | fdmi 6596 | . . . 4 ⊢ dom ·Q = (Q × Q) |
6 | 0nnq 10611 | . . . 4 ⊢ ¬ ∅ ∈ Q | |
7 | 5, 6 | ndmovrcl 7436 | . . 3 ⊢ ((𝐴 ·Q (*Q‘𝐴)) ∈ Q → (𝐴 ∈ Q ∧ (*Q‘𝐴) ∈ Q)) |
8 | 3, 7 | syl 17 | . 2 ⊢ (𝐴 ∈ Q → (𝐴 ∈ Q ∧ (*Q‘𝐴) ∈ Q)) |
9 | 8 | simprd 495 | 1 ⊢ (𝐴 ∈ Q → (*Q‘𝐴) ∈ Q) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2108 × cxp 5578 ‘cfv 6418 (class class class)co 7255 Qcnq 10539 1Qc1q 10540 ·Q cmq 10543 *Qcrq 10544 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-omul 8272 df-er 8456 df-ni 10559 df-mi 10561 df-lti 10562 df-mpq 10596 df-enq 10598 df-nq 10599 df-erq 10600 df-mq 10602 df-1nq 10603 df-rq 10604 |
This theorem is referenced by: recrecnq 10654 dmrecnq 10655 halfnq 10663 ltrnq 10666 mulclprlem 10706 prlem934 10720 prlem936 10734 reclem2pr 10735 reclem3pr 10736 reclem4pr 10737 |
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