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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 8020 | . . . 4 ⊢ 1 ∈ ℝ | |
2 | 0lt1 8148 | . . . 4 ⊢ 0 < 1 | |
3 | 1, 2 | pm3.2i 272 | . . 3 ⊢ (1 ∈ ℝ ∧ 0 < 1) |
4 | rpregt0 9736 | . . . 4 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) | |
5 | 4 | adantl 277 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) |
6 | nnre 8991 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
7 | nngt0 9009 | . . . . 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 8912 | . . 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 1353 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ (𝐴 / 1))) |
12 | nncn 8992 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ) | |
13 | 12 | div1d 8801 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐴 / 1) = 𝐴) |
14 | 13 | adantr 276 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 1) = 𝐴) |
15 | 14 | breq2d 4042 | . 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 1364 ∈ wcel 2164 class class class wbr 4030 (class class class)co 5919 ℝcr 7873 0cc0 7874 1c1 7875 < clt 8056 ≤ cle 8057 / cdiv 8693 ℕcn 8984 ℝ+crp 9722 |
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-sep 4148 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-cnex 7965 ax-resscn 7966 ax-1cn 7967 ax-1re 7968 ax-icn 7969 ax-addcl 7970 ax-addrcl 7971 ax-mulcl 7972 ax-mulrcl 7973 ax-addcom 7974 ax-mulcom 7975 ax-addass 7976 ax-mulass 7977 ax-distr 7978 ax-i2m1 7979 ax-0lt1 7980 ax-1rid 7981 ax-0id 7982 ax-rnegex 7983 ax-precex 7984 ax-cnre 7985 ax-pre-ltirr 7986 ax-pre-ltwlin 7987 ax-pre-lttrn 7988 ax-pre-apti 7989 ax-pre-ltadd 7990 ax-pre-mulgt0 7991 ax-pre-mulext 7992 |
This theorem depends on definitions: df-bi 117 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-nel 2460 df-ral 2477 df-rex 2478 df-reu 2479 df-rmo 2480 df-rab 2481 df-v 2762 df-sbc 2987 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-br 4031 df-opab 4092 df-id 4325 df-po 4328 df-iso 4329 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-iota 5216 df-fun 5257 df-fv 5263 df-riota 5874 df-ov 5922 df-oprab 5923 df-mpo 5924 df-pnf 8058 df-mnf 8059 df-xr 8060 df-ltxr 8061 df-le 8062 df-sub 8194 df-neg 8195 df-reap 8596 df-ap 8603 df-div 8694 df-inn 8985 df-rp 9723 |
This theorem is referenced by: nn0ledivnn 9836 |
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