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Mirrors > Home > MPE Home > Th. List > nn0ledivnn | Structured version Visualization version GIF version |
Description: Division of a nonnegative integer by a positive integer is less than or equal to the integer. (Contributed by AV, 19-Jun-2021.) |
Ref | Expression |
---|---|
nn0ledivnn | ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ) → (𝐴 / 𝐵) ≤ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elnn0 12478 | . . 3 ⊢ (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℕ ∨ 𝐴 = 0)) | |
2 | nnge1 12244 | . . . . . . 7 ⊢ (𝐵 ∈ ℕ → 1 ≤ 𝐵) | |
3 | 2 | adantl 481 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → 1 ≤ 𝐵) |
4 | nnrp 12991 | . . . . . . 7 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℝ+) | |
5 | nnledivrp 13092 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℝ+) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ 𝐴)) | |
6 | 4, 5 | sylan2 592 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (1 ≤ 𝐵 ↔ (𝐴 / 𝐵) ≤ 𝐴)) |
7 | 3, 6 | mpbid 231 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 / 𝐵) ≤ 𝐴) |
8 | 7 | ex 412 | . . . 4 ⊢ (𝐴 ∈ ℕ → (𝐵 ∈ ℕ → (𝐴 / 𝐵) ≤ 𝐴)) |
9 | nncn 12224 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℂ) | |
10 | nnne0 12250 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℕ → 𝐵 ≠ 0) | |
11 | 9, 10 | jca 511 | . . . . . . . . 9 ⊢ (𝐵 ∈ ℕ → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) |
12 | 11 | adantl 481 | . . . . . . . 8 ⊢ ((𝐴 = 0 ∧ 𝐵 ∈ ℕ) → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) |
13 | div0 11906 | . . . . . . . 8 ⊢ ((𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (0 / 𝐵) = 0) | |
14 | 12, 13 | syl 17 | . . . . . . 7 ⊢ ((𝐴 = 0 ∧ 𝐵 ∈ ℕ) → (0 / 𝐵) = 0) |
15 | 0le0 12317 | . . . . . . 7 ⊢ 0 ≤ 0 | |
16 | 14, 15 | eqbrtrdi 5180 | . . . . . 6 ⊢ ((𝐴 = 0 ∧ 𝐵 ∈ ℕ) → (0 / 𝐵) ≤ 0) |
17 | oveq1 7412 | . . . . . . . 8 ⊢ (𝐴 = 0 → (𝐴 / 𝐵) = (0 / 𝐵)) | |
18 | id 22 | . . . . . . . 8 ⊢ (𝐴 = 0 → 𝐴 = 0) | |
19 | 17, 18 | breq12d 5154 | . . . . . . 7 ⊢ (𝐴 = 0 → ((𝐴 / 𝐵) ≤ 𝐴 ↔ (0 / 𝐵) ≤ 0)) |
20 | 19 | adantr 480 | . . . . . 6 ⊢ ((𝐴 = 0 ∧ 𝐵 ∈ ℕ) → ((𝐴 / 𝐵) ≤ 𝐴 ↔ (0 / 𝐵) ≤ 0)) |
21 | 16, 20 | mpbird 257 | . . . . 5 ⊢ ((𝐴 = 0 ∧ 𝐵 ∈ ℕ) → (𝐴 / 𝐵) ≤ 𝐴) |
22 | 21 | ex 412 | . . . 4 ⊢ (𝐴 = 0 → (𝐵 ∈ ℕ → (𝐴 / 𝐵) ≤ 𝐴)) |
23 | 8, 22 | jaoi 854 | . . 3 ⊢ ((𝐴 ∈ ℕ ∨ 𝐴 = 0) → (𝐵 ∈ ℕ → (𝐴 / 𝐵) ≤ 𝐴)) |
24 | 1, 23 | sylbi 216 | . 2 ⊢ (𝐴 ∈ ℕ0 → (𝐵 ∈ ℕ → (𝐴 / 𝐵) ≤ 𝐴)) |
25 | 24 | imp 406 | 1 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ) → (𝐴 / 𝐵) ≤ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 844 = wceq 1533 ∈ wcel 2098 ≠ wne 2934 class class class wbr 5141 (class class class)co 7405 ℂcc 11110 0cc0 11112 1c1 11113 ≤ cle 11253 / cdiv 11875 ℕcn 12216 ℕ0cn0 12476 ℝ+crp 12980 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-n0 12477 df-rp 12981 |
This theorem is referenced by: 2lgslem1c 27281 |
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