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Mirrors > Home > ILE Home > Th. List > ex-ceil | GIF version |
Description: Example for df-ceil 10075. (Contributed by AV, 4-Sep-2021.) |
Ref | Expression |
---|---|
ex-ceil | ⊢ ((⌈‘(3 / 2)) = 2 ∧ (⌈‘-(3 / 2)) = -1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ex-fl 13108 | . 2 ⊢ ((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) | |
2 | 3z 9107 | . . . . . . 7 ⊢ 3 ∈ ℤ | |
3 | 2nn 8905 | . . . . . . 7 ⊢ 2 ∈ ℕ | |
4 | znq 9443 | . . . . . . 7 ⊢ ((3 ∈ ℤ ∧ 2 ∈ ℕ) → (3 / 2) ∈ ℚ) | |
5 | 2, 3, 4 | mp2an 423 | . . . . . 6 ⊢ (3 / 2) ∈ ℚ |
6 | qnegcl 9455 | . . . . . 6 ⊢ ((3 / 2) ∈ ℚ → -(3 / 2) ∈ ℚ) | |
7 | 5, 6 | ax-mp 5 | . . . . 5 ⊢ -(3 / 2) ∈ ℚ |
8 | ceilqval 10110 | . . . . 5 ⊢ (-(3 / 2) ∈ ℚ → (⌈‘-(3 / 2)) = -(⌊‘--(3 / 2))) | |
9 | 7, 8 | ax-mp 5 | . . . 4 ⊢ (⌈‘-(3 / 2)) = -(⌊‘--(3 / 2)) |
10 | qcn 9453 | . . . . . . . . . . 11 ⊢ ((3 / 2) ∈ ℚ → (3 / 2) ∈ ℂ) | |
11 | 5, 10 | ax-mp 5 | . . . . . . . . . 10 ⊢ (3 / 2) ∈ ℂ |
12 | 11 | negnegi 8056 | . . . . . . . . 9 ⊢ --(3 / 2) = (3 / 2) |
13 | 12 | eqcomi 2144 | . . . . . . . 8 ⊢ (3 / 2) = --(3 / 2) |
14 | 13 | fveq2i 5432 | . . . . . . 7 ⊢ (⌊‘(3 / 2)) = (⌊‘--(3 / 2)) |
15 | 14 | eqeq1i 2148 | . . . . . 6 ⊢ ((⌊‘(3 / 2)) = 1 ↔ (⌊‘--(3 / 2)) = 1) |
16 | 15 | biimpi 119 | . . . . 5 ⊢ ((⌊‘(3 / 2)) = 1 → (⌊‘--(3 / 2)) = 1) |
17 | 16 | negeqd 7981 | . . . 4 ⊢ ((⌊‘(3 / 2)) = 1 → -(⌊‘--(3 / 2)) = -1) |
18 | 9, 17 | syl5eq 2185 | . . 3 ⊢ ((⌊‘(3 / 2)) = 1 → (⌈‘-(3 / 2)) = -1) |
19 | ceilqval 10110 | . . . . 5 ⊢ ((3 / 2) ∈ ℚ → (⌈‘(3 / 2)) = -(⌊‘-(3 / 2))) | |
20 | 5, 19 | ax-mp 5 | . . . 4 ⊢ (⌈‘(3 / 2)) = -(⌊‘-(3 / 2)) |
21 | negeq 7979 | . . . . 5 ⊢ ((⌊‘-(3 / 2)) = -2 → -(⌊‘-(3 / 2)) = --2) | |
22 | 2cn 8815 | . . . . . 6 ⊢ 2 ∈ ℂ | |
23 | 22 | negnegi 8056 | . . . . 5 ⊢ --2 = 2 |
24 | 21, 23 | eqtrdi 2189 | . . . 4 ⊢ ((⌊‘-(3 / 2)) = -2 → -(⌊‘-(3 / 2)) = 2) |
25 | 20, 24 | syl5eq 2185 | . . 3 ⊢ ((⌊‘-(3 / 2)) = -2 → (⌈‘(3 / 2)) = 2) |
26 | 18, 25 | anim12ci 337 | . 2 ⊢ (((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) → ((⌈‘(3 / 2)) = 2 ∧ (⌈‘-(3 / 2)) = -1)) |
27 | 1, 26 | ax-mp 5 | 1 ⊢ ((⌈‘(3 / 2)) = 2 ∧ (⌈‘-(3 / 2)) = -1) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 = wceq 1332 ∈ wcel 1481 ‘cfv 5131 (class class class)co 5782 ℂcc 7642 1c1 7645 -cneg 7958 / cdiv 8456 ℕcn 8744 2c2 8795 3c3 8796 ℤcz 9078 ℚcq 9438 ⌊cfl 10072 ⌈cceil 10073 |
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 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-mulrcl 7743 ax-addcom 7744 ax-mulcom 7745 ax-addass 7746 ax-mulass 7747 ax-distr 7748 ax-i2m1 7749 ax-0lt1 7750 ax-1rid 7751 ax-0id 7752 ax-rnegex 7753 ax-precex 7754 ax-cnre 7755 ax-pre-ltirr 7756 ax-pre-ltwlin 7757 ax-pre-lttrn 7758 ax-pre-apti 7759 ax-pre-ltadd 7760 ax-pre-mulgt0 7761 ax-pre-mulext 7762 ax-arch 7763 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-reu 2424 df-rmo 2425 df-rab 2426 df-v 2691 df-sbc 2914 df-csb 3008 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-int 3780 df-iun 3823 df-br 3938 df-opab 3998 df-mpt 3999 df-id 4223 df-po 4226 df-iso 4227 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-fv 5139 df-riota 5738 df-ov 5785 df-oprab 5786 df-mpo 5787 df-1st 6046 df-2nd 6047 df-pnf 7826 df-mnf 7827 df-xr 7828 df-ltxr 7829 df-le 7830 df-sub 7959 df-neg 7960 df-reap 8361 df-ap 8368 df-div 8457 df-inn 8745 df-2 8803 df-3 8804 df-4 8805 df-n0 9002 df-z 9079 df-q 9439 df-rp 9471 df-fl 10074 df-ceil 10075 |
This theorem is referenced by: (None) |
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