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Mirrors > Home > ILE Home > Th. List > nnledivrp | GIF version |
Description: Division of a positive integer by a positive number is less than or equal to the integer iff the number is greater than or equal to 1. (Contributed by AV, 19-Jun-2021.) |
Ref | Expression |
---|---|
nnledivrp | ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1re 7944 | . . . 4 ⊢ 1 ∈ ℝ | |
2 | 0lt1 8071 | . . . 4 ⊢ 0 < 1 | |
3 | 1, 2 | pm3.2i 272 | . . 3 ⊢ (1 ∈ ℝ ∧ 0 < 1) |
4 | rpregt0 9651 | . . . 4 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) | |
5 | 4 | adantl 277 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) |
6 | nnre 8912 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
7 | nngt0 8930 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 0 < 𝐴) | |
8 | 6, 7 | jca 306 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
9 | 8 | adantr 276 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
10 | lediv2 8834 | . . 3 ⊢ (((1 ∈ ℝ ∧ 0 < 1) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵) ∧ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ (𝐴 / 1))) | |
11 | 3, 5, 9, 10 | mp3an2i 1342 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ (𝐴 / 1))) |
12 | nncn 8913 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ) | |
13 | 12 | div1d 8723 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐴 / 1) = 𝐴) |
14 | 13 | adantr 276 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 1) = 𝐴) |
15 | 14 | breq2d 4012 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → ((𝐴 / 𝐵) ≤ (𝐴 / 1) ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
16 | 11, 15 | bitrd 188 | 1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1353 ∈ wcel 2148 class class class wbr 4000 (class class class)co 5869 ℝcr 7798 0cc0 7799 1c1 7800 < clt 7979 ≤ cle 7980 / cdiv 8615 ℕcn 8905 ℝ+crp 9637 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-sep 4118 ax-pow 4171 ax-pr 4206 ax-un 4430 ax-setind 4533 ax-cnex 7890 ax-resscn 7891 ax-1cn 7892 ax-1re 7893 ax-icn 7894 ax-addcl 7895 ax-addrcl 7896 ax-mulcl 7897 ax-mulrcl 7898 ax-addcom 7899 ax-mulcom 7900 ax-addass 7901 ax-mulass 7902 ax-distr 7903 ax-i2m1 7904 ax-0lt1 7905 ax-1rid 7906 ax-0id 7907 ax-rnegex 7908 ax-precex 7909 ax-cnre 7910 ax-pre-ltirr 7911 ax-pre-ltwlin 7912 ax-pre-lttrn 7913 ax-pre-apti 7914 ax-pre-ltadd 7915 ax-pre-mulgt0 7916 ax-pre-mulext 7917 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3576 df-sn 3597 df-pr 3598 df-op 3600 df-uni 3808 df-int 3843 df-br 4001 df-opab 4062 df-id 4290 df-po 4293 df-iso 4294 df-xp 4629 df-rel 4630 df-cnv 4631 df-co 4632 df-dm 4633 df-iota 5174 df-fun 5214 df-fv 5220 df-riota 5825 df-ov 5872 df-oprab 5873 df-mpo 5874 df-pnf 7981 df-mnf 7982 df-xr 7983 df-ltxr 7984 df-le 7985 df-sub 8117 df-neg 8118 df-reap 8519 df-ap 8526 df-div 8616 df-inn 8906 df-rp 9638 |
This theorem is referenced by: nn0ledivnn 9751 |
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