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| Mirrors > Home > MPE Home > Th. List > ex-fl | Structured version Visualization version GIF version | ||
| Description: Example for df-fl 13751. Example by David A. Wheeler. (Contributed by Mario Carneiro, 18-Jun-2015.) |
| Ref | Expression |
|---|---|
| ex-fl | ⊢ ((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 11144 | . . . 4 ⊢ 1 ∈ ℝ | |
| 2 | 3re 12261 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 3 | 2 | rehalfcli 12426 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 4 | 2cn 12256 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
| 5 | 4 | mullidi 11150 | . . . . . 6 ⊢ (1 · 2) = 2 |
| 6 | 2lt3 12348 | . . . . . 6 ⊢ 2 < 3 | |
| 7 | 5, 6 | eqbrtri 5106 | . . . . 5 ⊢ (1 · 2) < 3 |
| 8 | 2pos 12284 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 2re 12255 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 10 | 1, 2, 9 | ltmuldivi 12076 | . . . . . 6 ⊢ (0 < 2 → ((1 · 2) < 3 ↔ 1 < (3 / 2))) |
| 11 | 8, 10 | ax-mp 5 | . . . . 5 ⊢ ((1 · 2) < 3 ↔ 1 < (3 / 2)) |
| 12 | 7, 11 | mpbi 230 | . . . 4 ⊢ 1 < (3 / 2) |
| 13 | 1, 3, 12 | ltleii 11269 | . . 3 ⊢ 1 ≤ (3 / 2) |
| 14 | 3lt4 12350 | . . . . . 6 ⊢ 3 < 4 | |
| 15 | 2t2e4 12340 | . . . . . 6 ⊢ (2 · 2) = 4 | |
| 16 | 14, 15 | breqtrri 5112 | . . . . 5 ⊢ 3 < (2 · 2) |
| 17 | 9, 8 | pm3.2i 470 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 18 | ltdivmul 12031 | . . . . . 6 ⊢ ((3 ∈ ℝ ∧ 2 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((3 / 2) < 2 ↔ 3 < (2 · 2))) | |
| 19 | 2, 9, 17, 18 | mp3an 1464 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ 3 < (2 · 2)) |
| 20 | 16, 19 | mpbir 231 | . . . 4 ⊢ (3 / 2) < 2 |
| 21 | df-2 12244 | . . . 4 ⊢ 2 = (1 + 1) | |
| 22 | 20, 21 | breqtri 5110 | . . 3 ⊢ (3 / 2) < (1 + 1) |
| 23 | 1z 12557 | . . . 4 ⊢ 1 ∈ ℤ | |
| 24 | flbi 13775 | . . . 4 ⊢ (((3 / 2) ∈ ℝ ∧ 1 ∈ ℤ) → ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1)))) | |
| 25 | 3, 23, 24 | mp2an 693 | . . 3 ⊢ ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1))) |
| 26 | 13, 22, 25 | mpbir2an 712 | . 2 ⊢ (⌊‘(3 / 2)) = 1 |
| 27 | 9 | renegcli 11455 | . . . 4 ⊢ -2 ∈ ℝ |
| 28 | 3 | renegcli 11455 | . . . 4 ⊢ -(3 / 2) ∈ ℝ |
| 29 | 3, 9 | ltnegi 11694 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ -2 < -(3 / 2)) |
| 30 | 20, 29 | mpbi 230 | . . . 4 ⊢ -2 < -(3 / 2) |
| 31 | 27, 28, 30 | ltleii 11269 | . . 3 ⊢ -2 ≤ -(3 / 2) |
| 32 | 4 | negcli 11462 | . . . . . . 7 ⊢ -2 ∈ ℂ |
| 33 | ax-1cn 11096 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 34 | negdi2 11452 | . . . . . . 7 ⊢ ((-2 ∈ ℂ ∧ 1 ∈ ℂ) → -(-2 + 1) = (--2 − 1)) | |
| 35 | 32, 33, 34 | mp2an 693 | . . . . . 6 ⊢ -(-2 + 1) = (--2 − 1) |
| 36 | 4 | negnegi 11464 | . . . . . . 7 ⊢ --2 = 2 |
| 37 | 36 | oveq1i 7377 | . . . . . 6 ⊢ (--2 − 1) = (2 − 1) |
| 38 | 35, 37 | eqtri 2759 | . . . . 5 ⊢ -(-2 + 1) = (2 − 1) |
| 39 | 2m1e1 12302 | . . . . . 6 ⊢ (2 − 1) = 1 | |
| 40 | 39, 12 | eqbrtri 5106 | . . . . 5 ⊢ (2 − 1) < (3 / 2) |
| 41 | 38, 40 | eqbrtri 5106 | . . . 4 ⊢ -(-2 + 1) < (3 / 2) |
| 42 | 27, 1 | readdcli 11160 | . . . . 5 ⊢ (-2 + 1) ∈ ℝ |
| 43 | 42, 3 | ltnegcon1i 11701 | . . . 4 ⊢ (-(-2 + 1) < (3 / 2) ↔ -(3 / 2) < (-2 + 1)) |
| 44 | 41, 43 | mpbi 230 | . . 3 ⊢ -(3 / 2) < (-2 + 1) |
| 45 | 2z 12559 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 46 | znegcl 12562 | . . . . 5 ⊢ (2 ∈ ℤ → -2 ∈ ℤ) | |
| 47 | 45, 46 | ax-mp 5 | . . . 4 ⊢ -2 ∈ ℤ |
| 48 | flbi 13775 | . . . 4 ⊢ ((-(3 / 2) ∈ ℝ ∧ -2 ∈ ℤ) → ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1)))) | |
| 49 | 28, 47, 48 | mp2an 693 | . . 3 ⊢ ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1))) |
| 50 | 31, 44, 49 | mpbir2an 712 | . 2 ⊢ (⌊‘-(3 / 2)) = -2 |
| 51 | 26, 50 | pm3.2i 470 | 1 ⊢ ((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5085 ‘cfv 6498 (class class class)co 7367 ℂcc 11036 ℝcr 11037 0cc0 11038 1c1 11039 + caddc 11041 · cmul 11043 < clt 11179 ≤ cle 11180 − cmin 11377 -cneg 11378 / cdiv 11807 2c2 12236 3c3 12237 4c4 12238 ℤcz 12524 ⌊cfl 13749 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-sup 9355 df-inf 9356 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-n0 12438 df-z 12525 df-uz 12789 df-fl 13751 |
| This theorem is referenced by: ex-ceil 30518 ppivalnn4 48090 |
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