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Mirrors > Home > MPE Home > Th. List > flmulnn0 | Structured version Visualization version GIF version |
Description: Move a nonnegative integer in and out of a floor. (Contributed by NM, 2-Jan-2009.) (Proof shortened by Fan Zheng, 7-Jun-2016.) |
Ref | Expression |
---|---|
flmulnn0 | ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (𝑁 · (⌊‘𝐴)) ≤ (⌊‘(𝑁 · 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reflcl 13257 | . . . 4 ⊢ (𝐴 ∈ ℝ → (⌊‘𝐴) ∈ ℝ) | |
2 | 1 | adantl 485 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (⌊‘𝐴) ∈ ℝ) |
3 | simpr 488 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → 𝐴 ∈ ℝ) | |
4 | simpl 486 | . . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → 𝑁 ∈ ℕ0) | |
5 | 4 | nn0red 12037 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → 𝑁 ∈ ℝ) |
6 | 4 | nn0ge0d 12039 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → 0 ≤ 𝑁) |
7 | flle 13260 | . . . 4 ⊢ (𝐴 ∈ ℝ → (⌊‘𝐴) ≤ 𝐴) | |
8 | 7 | adantl 485 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (⌊‘𝐴) ≤ 𝐴) |
9 | 2, 3, 5, 6, 8 | lemul2ad 11658 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (𝑁 · (⌊‘𝐴)) ≤ (𝑁 · 𝐴)) |
10 | 5, 3 | remulcld 10749 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (𝑁 · 𝐴) ∈ ℝ) |
11 | nn0z 12086 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) | |
12 | flcl 13256 | . . . 4 ⊢ (𝐴 ∈ ℝ → (⌊‘𝐴) ∈ ℤ) | |
13 | zmulcl 12112 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ (⌊‘𝐴) ∈ ℤ) → (𝑁 · (⌊‘𝐴)) ∈ ℤ) | |
14 | 11, 12, 13 | syl2an 599 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (𝑁 · (⌊‘𝐴)) ∈ ℤ) |
15 | flge 13266 | . . 3 ⊢ (((𝑁 · 𝐴) ∈ ℝ ∧ (𝑁 · (⌊‘𝐴)) ∈ ℤ) → ((𝑁 · (⌊‘𝐴)) ≤ (𝑁 · 𝐴) ↔ (𝑁 · (⌊‘𝐴)) ≤ (⌊‘(𝑁 · 𝐴)))) | |
16 | 10, 14, 15 | syl2anc 587 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → ((𝑁 · (⌊‘𝐴)) ≤ (𝑁 · 𝐴) ↔ (𝑁 · (⌊‘𝐴)) ≤ (⌊‘(𝑁 · 𝐴)))) |
17 | 9, 16 | mpbid 235 | 1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℝ) → (𝑁 · (⌊‘𝐴)) ≤ (⌊‘(𝑁 · 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∈ wcel 2114 class class class wbr 5030 ‘cfv 6339 (class class class)co 7170 ℝcr 10614 · cmul 10620 ≤ cle 10754 ℕ0cn0 11976 ℤcz 12062 ⌊cfl 13251 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-cnex 10671 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 ax-pre-sup 10693 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-er 8320 df-en 8556 df-dom 8557 df-sdom 8558 df-sup 8979 df-inf 8980 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-nn 11717 df-n0 11977 df-z 12063 df-uz 12325 df-fl 13253 |
This theorem is referenced by: modmulnn 13348 |
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