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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 7919 | . . . 4 ⊢ 1 ∈ ℝ | |
2 | 0lt1 8046 | . . . 4 ⊢ 0 < 1 | |
3 | 1, 2 | pm3.2i 270 | . . 3 ⊢ (1 ∈ ℝ ∧ 0 < 1) |
4 | rpregt0 9624 | . . . 4 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) | |
5 | 4 | adantl 275 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐵 ∈ ℝ ∧ 0 < 𝐵)) |
6 | nnre 8885 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
7 | nngt0 8903 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 0 < 𝐴) | |
8 | 6, 7 | jca 304 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
9 | 8 | adantr 274 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐴 ∈ ℝ ∧ 0 < 𝐴)) |
10 | lediv2 8807 | . . 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 1337 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ (𝐴 / 1))) |
12 | nncn 8886 | . . . . 5 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ) | |
13 | 12 | div1d 8697 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐴 / 1) = 𝐴) |
14 | 13 | adantr 274 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 1) = 𝐴) |
15 | 14 | breq2d 4001 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → ((𝐴 / 𝐵) ≤ (𝐴 / 1) ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
16 | 11, 15 | bitrd 187 | 1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1348 ∈ wcel 2141 class class class wbr 3989 (class class class)co 5853 ℝcr 7773 0cc0 7774 1c1 7775 < clt 7954 ≤ cle 7955 / cdiv 8589 ℕcn 8878 ℝ+crp 9610 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-apti 7889 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 ax-pre-mulext 7892 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-br 3990 df-opab 4051 df-id 4278 df-po 4281 df-iso 4282 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-iota 5160 df-fun 5200 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-reap 8494 df-ap 8501 df-div 8590 df-inn 8879 df-rp 9611 |
This theorem is referenced by: nn0ledivnn 9724 |
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