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Mirrors > Home > ILE Home > Th. List > adddivflid | GIF version |
Description: The floor of a sum of an integer and a fraction is equal to the integer iff the denominator of the fraction is less than the numerator. (Contributed by AV, 14-Jul-2021.) |
Ref | Expression |
---|---|
adddivflid | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 < 𝐶 ↔ (⌊‘(𝐴 + (𝐵 / 𝐶))) = 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 946 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → 𝐴 ∈ ℤ) | |
2 | nn0z 8868 | . . . . . 6 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℤ) | |
3 | znq 9208 | . . . . . 6 ⊢ ((𝐵 ∈ ℤ ∧ 𝐶 ∈ ℕ) → (𝐵 / 𝐶) ∈ ℚ) | |
4 | 2, 3 | sylan 278 | . . . . 5 ⊢ ((𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 / 𝐶) ∈ ℚ) |
5 | 4 | 3adant1 964 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 / 𝐶) ∈ ℚ) |
6 | 1, 5 | jca 301 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐴 ∈ ℤ ∧ (𝐵 / 𝐶) ∈ ℚ)) |
7 | flqbi2 9847 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐵 / 𝐶) ∈ ℚ) → ((⌊‘(𝐴 + (𝐵 / 𝐶))) = 𝐴 ↔ (0 ≤ (𝐵 / 𝐶) ∧ (𝐵 / 𝐶) < 1))) | |
8 | 6, 7 | syl 14 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → ((⌊‘(𝐴 + (𝐵 / 𝐶))) = 𝐴 ↔ (0 ≤ (𝐵 / 𝐶) ∧ (𝐵 / 𝐶) < 1))) |
9 | nn0re 8780 | . . . . . . 7 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℝ) | |
10 | nn0ge0 8796 | . . . . . . 7 ⊢ (𝐵 ∈ ℕ0 → 0 ≤ 𝐵) | |
11 | 9, 10 | jca 301 | . . . . . 6 ⊢ (𝐵 ∈ ℕ0 → (𝐵 ∈ ℝ ∧ 0 ≤ 𝐵)) |
12 | nnre 8527 | . . . . . . 7 ⊢ (𝐶 ∈ ℕ → 𝐶 ∈ ℝ) | |
13 | nngt0 8545 | . . . . . . 7 ⊢ (𝐶 ∈ ℕ → 0 < 𝐶) | |
14 | 12, 13 | jca 301 | . . . . . 6 ⊢ (𝐶 ∈ ℕ → (𝐶 ∈ ℝ ∧ 0 < 𝐶)) |
15 | 11, 14 | anim12i 332 | . . . . 5 ⊢ ((𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → ((𝐵 ∈ ℝ ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶))) |
16 | 15 | 3adant1 964 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → ((𝐵 ∈ ℝ ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶))) |
17 | divge0 8431 | . . . 4 ⊢ (((𝐵 ∈ ℝ ∧ 0 ≤ 𝐵) ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 0 ≤ (𝐵 / 𝐶)) | |
18 | 16, 17 | syl 14 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → 0 ≤ (𝐵 / 𝐶)) |
19 | 18 | biantrurd 300 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → ((𝐵 / 𝐶) < 1 ↔ (0 ≤ (𝐵 / 𝐶) ∧ (𝐵 / 𝐶) < 1))) |
20 | nnrp 9242 | . . . . 5 ⊢ (𝐶 ∈ ℕ → 𝐶 ∈ ℝ+) | |
21 | 9, 20 | anim12i 332 | . . . 4 ⊢ ((𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ+)) |
22 | 21 | 3adant1 964 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ+)) |
23 | divlt1lt 9300 | . . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ+) → ((𝐵 / 𝐶) < 1 ↔ 𝐵 < 𝐶)) | |
24 | 22, 23 | syl 14 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → ((𝐵 / 𝐶) < 1 ↔ 𝐵 < 𝐶)) |
25 | 8, 19, 24 | 3bitr2rd 216 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0 ∧ 𝐶 ∈ ℕ) → (𝐵 < 𝐶 ↔ (⌊‘(𝐴 + (𝐵 / 𝐶))) = 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 927 = wceq 1296 ∈ wcel 1445 class class class wbr 3867 ‘cfv 5049 (class class class)co 5690 ℝcr 7446 0cc0 7447 1c1 7448 + caddc 7450 < clt 7619 ≤ cle 7620 / cdiv 8236 ℕcn 8520 ℕ0cn0 8771 ℤcz 8848 ℚcq 9203 ℝ+crp 9233 ⌊cfl 9824 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 582 ax-in2 583 ax-io 668 ax-5 1388 ax-7 1389 ax-gen 1390 ax-ie1 1434 ax-ie2 1435 ax-8 1447 ax-10 1448 ax-11 1449 ax-i12 1450 ax-bndl 1451 ax-4 1452 ax-13 1456 ax-14 1457 ax-17 1471 ax-i9 1475 ax-ial 1479 ax-i5r 1480 ax-ext 2077 ax-sep 3978 ax-pow 4030 ax-pr 4060 ax-un 4284 ax-setind 4381 ax-cnex 7533 ax-resscn 7534 ax-1cn 7535 ax-1re 7536 ax-icn 7537 ax-addcl 7538 ax-addrcl 7539 ax-mulcl 7540 ax-mulrcl 7541 ax-addcom 7542 ax-mulcom 7543 ax-addass 7544 ax-mulass 7545 ax-distr 7546 ax-i2m1 7547 ax-0lt1 7548 ax-1rid 7549 ax-0id 7550 ax-rnegex 7551 ax-precex 7552 ax-cnre 7553 ax-pre-ltirr 7554 ax-pre-ltwlin 7555 ax-pre-lttrn 7556 ax-pre-apti 7557 ax-pre-ltadd 7558 ax-pre-mulgt0 7559 ax-pre-mulext 7560 ax-arch 7561 |
This theorem depends on definitions: df-bi 116 df-3or 928 df-3an 929 df-tru 1299 df-fal 1302 df-nf 1402 df-sb 1700 df-eu 1958 df-mo 1959 df-clab 2082 df-cleq 2088 df-clel 2091 df-nfc 2224 df-ne 2263 df-nel 2358 df-ral 2375 df-rex 2376 df-reu 2377 df-rmo 2378 df-rab 2379 df-v 2635 df-sbc 2855 df-csb 2948 df-dif 3015 df-un 3017 df-in 3019 df-ss 3026 df-pw 3451 df-sn 3472 df-pr 3473 df-op 3475 df-uni 3676 df-int 3711 df-iun 3754 df-br 3868 df-opab 3922 df-mpt 3923 df-id 4144 df-po 4147 df-iso 4148 df-xp 4473 df-rel 4474 df-cnv 4475 df-co 4476 df-dm 4477 df-rn 4478 df-res 4479 df-ima 4480 df-iota 5014 df-fun 5051 df-fn 5052 df-f 5053 df-fv 5057 df-riota 5646 df-ov 5693 df-oprab 5694 df-mpt2 5695 df-1st 5949 df-2nd 5950 df-pnf 7621 df-mnf 7622 df-xr 7623 df-ltxr 7624 df-le 7625 df-sub 7752 df-neg 7753 df-reap 8149 df-ap 8156 df-div 8237 df-inn 8521 df-n0 8772 df-z 8849 df-q 9204 df-rp 9234 df-fl 9826 |
This theorem is referenced by: (None) |
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