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| Mirrors > Home > ILE Home > Th. List > flqbi2 | GIF version | ||
| Description: A condition equivalent to floor. (Contributed by Jim Kingdon, 9-Oct-2021.) |
| Ref | Expression |
|---|---|
| flqbi2 | ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → ((⌊‘(𝑁 + 𝐹)) = 𝑁 ↔ (0 ≤ 𝐹 ∧ 𝐹 < 1))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zq 9833 | . . . 4 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℚ) | |
| 2 | qaddcl 9842 | . . . 4 ⊢ ((𝑁 ∈ ℚ ∧ 𝐹 ∈ ℚ) → (𝑁 + 𝐹) ∈ ℚ) | |
| 3 | 1, 2 | sylan 283 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → (𝑁 + 𝐹) ∈ ℚ) |
| 4 | simpl 109 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → 𝑁 ∈ ℤ) | |
| 5 | flqbi 10522 | . . 3 ⊢ (((𝑁 + 𝐹) ∈ ℚ ∧ 𝑁 ∈ ℤ) → ((⌊‘(𝑁 + 𝐹)) = 𝑁 ↔ (𝑁 ≤ (𝑁 + 𝐹) ∧ (𝑁 + 𝐹) < (𝑁 + 1)))) | |
| 6 | 3, 4, 5 | syl2anc 411 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → ((⌊‘(𝑁 + 𝐹)) = 𝑁 ↔ (𝑁 ≤ (𝑁 + 𝐹) ∧ (𝑁 + 𝐹) < (𝑁 + 1)))) |
| 7 | zre 9461 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
| 8 | qre 9832 | . . 3 ⊢ (𝐹 ∈ ℚ → 𝐹 ∈ ℝ) | |
| 9 | addge01 8630 | . . . 4 ⊢ ((𝑁 ∈ ℝ ∧ 𝐹 ∈ ℝ) → (0 ≤ 𝐹 ↔ 𝑁 ≤ (𝑁 + 𝐹))) | |
| 10 | 1re 8156 | . . . . . 6 ⊢ 1 ∈ ℝ | |
| 11 | ltadd2 8577 | . . . . . 6 ⊢ ((𝐹 ∈ ℝ ∧ 1 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝐹 < 1 ↔ (𝑁 + 𝐹) < (𝑁 + 1))) | |
| 12 | 10, 11 | mp3an2 1359 | . . . . 5 ⊢ ((𝐹 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝐹 < 1 ↔ (𝑁 + 𝐹) < (𝑁 + 1))) |
| 13 | 12 | ancoms 268 | . . . 4 ⊢ ((𝑁 ∈ ℝ ∧ 𝐹 ∈ ℝ) → (𝐹 < 1 ↔ (𝑁 + 𝐹) < (𝑁 + 1))) |
| 14 | 9, 13 | anbi12d 473 | . . 3 ⊢ ((𝑁 ∈ ℝ ∧ 𝐹 ∈ ℝ) → ((0 ≤ 𝐹 ∧ 𝐹 < 1) ↔ (𝑁 ≤ (𝑁 + 𝐹) ∧ (𝑁 + 𝐹) < (𝑁 + 1)))) |
| 15 | 7, 8, 14 | syl2an 289 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → ((0 ≤ 𝐹 ∧ 𝐹 < 1) ↔ (𝑁 ≤ (𝑁 + 𝐹) ∧ (𝑁 + 𝐹) < (𝑁 + 1)))) |
| 16 | 6, 15 | bitr4d 191 | 1 ⊢ ((𝑁 ∈ ℤ ∧ 𝐹 ∈ ℚ) → ((⌊‘(𝑁 + 𝐹)) = 𝑁 ↔ (0 ≤ 𝐹 ∧ 𝐹 < 1))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1395 ∈ wcel 2200 class class class wbr 4083 ‘cfv 5318 (class class class)co 6007 ℝcr 8009 0cc0 8010 1c1 8011 + caddc 8013 < clt 8192 ≤ cle 8193 ℤcz 9457 ℚcq 9826 ⌊cfl 10500 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-mulrcl 8109 ax-addcom 8110 ax-mulcom 8111 ax-addass 8112 ax-mulass 8113 ax-distr 8114 ax-i2m1 8115 ax-0lt1 8116 ax-1rid 8117 ax-0id 8118 ax-rnegex 8119 ax-precex 8120 ax-cnre 8121 ax-pre-ltirr 8122 ax-pre-ltwlin 8123 ax-pre-lttrn 8124 ax-pre-apti 8125 ax-pre-ltadd 8126 ax-pre-mulgt0 8127 ax-pre-mulext 8128 ax-arch 8129 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4384 df-po 4387 df-iso 4388 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-fv 5326 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 df-pnf 8194 df-mnf 8195 df-xr 8196 df-ltxr 8197 df-le 8198 df-sub 8330 df-neg 8331 df-reap 8733 df-ap 8740 df-div 8831 df-inn 9122 df-n0 9381 df-z 9458 df-q 9827 df-rp 9862 df-fl 10502 |
| This theorem is referenced by: adddivflid 10524 divfl0 10528 fldiv4p1lem1div2 10537 flqdiv 10555 modqid 10583 flodddiv4 12462 bitsp1o 12479 fldivp1 12886 |
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