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Mirrors > Home > ILE Home > Th. List > appdiv0nq | GIF version |
Description: Approximate division for positive rationals. This can be thought of as a variation of appdivnq 7625 in which 𝐴 is zero, although it can be stated and proved in terms of positive rationals alone, without zero as such. (Contributed by Jim Kingdon, 9-Dec-2019.) |
Ref | Expression |
---|---|
appdiv0nq | ⊢ ((𝐵 ∈ Q ∧ 𝐶 ∈ Q) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nsmallnqq 7474 | . . 3 ⊢ (𝐵 ∈ Q → ∃𝑥 ∈ Q 𝑥 <Q 𝐵) | |
2 | 1 | adantr 276 | . 2 ⊢ ((𝐵 ∈ Q ∧ 𝐶 ∈ Q) → ∃𝑥 ∈ Q 𝑥 <Q 𝐵) |
3 | appdivnq 7625 | . . . . 5 ⊢ ((𝑥 <Q 𝐵 ∧ 𝐶 ∈ Q) → ∃𝑚 ∈ Q (𝑥 <Q (𝑚 ·Q 𝐶) ∧ (𝑚 ·Q 𝐶) <Q 𝐵)) | |
4 | simpr 110 | . . . . . 6 ⊢ ((𝑥 <Q (𝑚 ·Q 𝐶) ∧ (𝑚 ·Q 𝐶) <Q 𝐵) → (𝑚 ·Q 𝐶) <Q 𝐵) | |
5 | 4 | reximi 2591 | . . . . 5 ⊢ (∃𝑚 ∈ Q (𝑥 <Q (𝑚 ·Q 𝐶) ∧ (𝑚 ·Q 𝐶) <Q 𝐵) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
6 | 3, 5 | syl 14 | . . . 4 ⊢ ((𝑥 <Q 𝐵 ∧ 𝐶 ∈ Q) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
7 | 6 | ancoms 268 | . . 3 ⊢ ((𝐶 ∈ Q ∧ 𝑥 <Q 𝐵) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
8 | 7 | ad2ant2l 508 | . 2 ⊢ (((𝐵 ∈ Q ∧ 𝐶 ∈ Q) ∧ (𝑥 ∈ Q ∧ 𝑥 <Q 𝐵)) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
9 | 2, 8 | rexlimddv 2616 | 1 ⊢ ((𝐵 ∈ Q ∧ 𝐶 ∈ Q) → ∃𝑚 ∈ Q (𝑚 ·Q 𝐶) <Q 𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2164 ∃wrex 2473 class class class wbr 4030 (class class class)co 5919 Qcnq 7342 ·Q cmq 7345 <Q cltq 7347 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4145 ax-sep 4148 ax-nul 4156 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-iinf 4621 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2987 df-csb 3082 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-nul 3448 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-iun 3915 df-br 4031 df-opab 4092 df-mpt 4093 df-tr 4129 df-eprel 4321 df-id 4325 df-po 4328 df-iso 4329 df-iord 4398 df-on 4400 df-suc 4403 df-iom 4624 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 df-iota 5216 df-fun 5257 df-fn 5258 df-f 5259 df-f1 5260 df-fo 5261 df-f1o 5262 df-fv 5263 df-ov 5922 df-oprab 5923 df-mpo 5924 df-1st 6195 df-2nd 6196 df-recs 6360 df-irdg 6425 df-1o 6471 df-oadd 6475 df-omul 6476 df-er 6589 df-ec 6591 df-qs 6595 df-ni 7366 df-pli 7367 df-mi 7368 df-lti 7369 df-plpq 7406 df-mpq 7407 df-enq 7409 df-nqqs 7410 df-plqqs 7411 df-mqqs 7412 df-1nqqs 7413 df-rq 7414 df-ltnqqs 7415 |
This theorem is referenced by: prmuloc 7628 |
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