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Mirrors > Home > ILE Home > Th. List > flqltnz | GIF version |
Description: If A is not an integer, then the floor of A is less than A. (Contributed by Jim Kingdon, 9-Oct-2021.) |
Ref | Expression |
---|---|
flqltnz | ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) < 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 109 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → ¬ 𝐴 ∈ ℤ) | |
2 | flqidz 10189 | . . . . . . 7 ⊢ (𝐴 ∈ ℚ → ((⌊‘𝐴) = 𝐴 ↔ 𝐴 ∈ ℤ)) | |
3 | 2 | adantr 274 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → ((⌊‘𝐴) = 𝐴 ↔ 𝐴 ∈ ℤ)) |
4 | 1, 3 | mtbird 663 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → ¬ (⌊‘𝐴) = 𝐴) |
5 | 4 | neqned 2334 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) ≠ 𝐴) |
6 | 5 | necomd 2413 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → 𝐴 ≠ (⌊‘𝐴)) |
7 | simpl 108 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → 𝐴 ∈ ℚ) | |
8 | 7 | flqcld 10180 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) ∈ ℤ) |
9 | zq 9536 | . . . . 5 ⊢ ((⌊‘𝐴) ∈ ℤ → (⌊‘𝐴) ∈ ℚ) | |
10 | 8, 9 | syl 14 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) ∈ ℚ) |
11 | qapne 9549 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ (⌊‘𝐴) ∈ ℚ) → (𝐴 # (⌊‘𝐴) ↔ 𝐴 ≠ (⌊‘𝐴))) | |
12 | 10, 11 | syldan 280 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (𝐴 # (⌊‘𝐴) ↔ 𝐴 ≠ (⌊‘𝐴))) |
13 | 6, 12 | mpbird 166 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → 𝐴 # (⌊‘𝐴)) |
14 | 8 | zred 9287 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) ∈ ℝ) |
15 | qre 9535 | . . . 4 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℝ) | |
16 | 15 | adantr 274 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → 𝐴 ∈ ℝ) |
17 | flqlelt 10179 | . . . . 5 ⊢ (𝐴 ∈ ℚ → ((⌊‘𝐴) ≤ 𝐴 ∧ 𝐴 < ((⌊‘𝐴) + 1))) | |
18 | 17 | adantr 274 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → ((⌊‘𝐴) ≤ 𝐴 ∧ 𝐴 < ((⌊‘𝐴) + 1))) |
19 | 18 | simpld 111 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) ≤ 𝐴) |
20 | 14, 16, 19 | leltapd 8515 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → ((⌊‘𝐴) < 𝐴 ↔ 𝐴 # (⌊‘𝐴))) |
21 | 13, 20 | mpbird 166 | 1 ⊢ ((𝐴 ∈ ℚ ∧ ¬ 𝐴 ∈ ℤ) → (⌊‘𝐴) < 𝐴) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1335 ∈ wcel 2128 ≠ wne 2327 class class class wbr 3966 ‘cfv 5171 (class class class)co 5825 ℝcr 7732 1c1 7734 + caddc 7736 < clt 7913 ≤ cle 7914 # cap 8457 ℤcz 9168 ℚcq 9529 ⌊cfl 10171 |
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 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4083 ax-pow 4136 ax-pr 4170 ax-un 4394 ax-setind 4497 ax-cnex 7824 ax-resscn 7825 ax-1cn 7826 ax-1re 7827 ax-icn 7828 ax-addcl 7829 ax-addrcl 7830 ax-mulcl 7831 ax-mulrcl 7832 ax-addcom 7833 ax-mulcom 7834 ax-addass 7835 ax-mulass 7836 ax-distr 7837 ax-i2m1 7838 ax-0lt1 7839 ax-1rid 7840 ax-0id 7841 ax-rnegex 7842 ax-precex 7843 ax-cnre 7844 ax-pre-ltirr 7845 ax-pre-ltwlin 7846 ax-pre-lttrn 7847 ax-pre-apti 7848 ax-pre-ltadd 7849 ax-pre-mulgt0 7850 ax-pre-mulext 7851 ax-arch 7852 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rmo 2443 df-rab 2444 df-v 2714 df-sbc 2938 df-csb 3032 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3774 df-int 3809 df-iun 3852 df-br 3967 df-opab 4027 df-mpt 4028 df-id 4254 df-po 4257 df-iso 4258 df-xp 4593 df-rel 4594 df-cnv 4595 df-co 4596 df-dm 4597 df-rn 4598 df-res 4599 df-ima 4600 df-iota 5136 df-fun 5173 df-fn 5174 df-f 5175 df-fv 5179 df-riota 5781 df-ov 5828 df-oprab 5829 df-mpo 5830 df-1st 6089 df-2nd 6090 df-pnf 7915 df-mnf 7916 df-xr 7917 df-ltxr 7918 df-le 7919 df-sub 8049 df-neg 8050 df-reap 8451 df-ap 8458 df-div 8547 df-inn 8835 df-n0 9092 df-z 9169 df-q 9530 df-rp 9562 df-fl 10173 |
This theorem is referenced by: fldivndvdslt 11830 |
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