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| Mirrors > Home > MPE Home > Th. List > ex-fl | Structured version Visualization version GIF version | ||
| Description: Example for df-fl 13827. 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 11209 | . . . 4 ⊢ 1 ∈ ℝ | |
| 2 | 3re 12322 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 3 | 2 | rehalfcli 12494 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 4 | 2cn 12317 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
| 5 | 4 | mullidi 11215 | . . . . . 6 ⊢ (1 · 2) = 2 |
| 6 | 2lt3 12415 | . . . . . 6 ⊢ 2 < 3 | |
| 7 | 5, 6 | eqbrtri 5133 | . . . . 5 ⊢ (1 · 2) < 3 |
| 8 | 2pos 12346 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 2re 12316 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 10 | 1, 2, 9 | ltmuldivi 12136 | . . . . . 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 233 | . . . 4 ⊢ 1 < (3 / 2) |
| 13 | 1, 3, 12 | ltleii 11334 | . . 3 ⊢ 1 ≤ (3 / 2) |
| 14 | 3lt4 12418 | . . . . . 6 ⊢ 3 < 4 | |
| 15 | 2t2e4 12405 | . . . . . 6 ⊢ (2 · 2) = 4 | |
| 16 | 14, 15 | breqtrri 5139 | . . . . 5 ⊢ 3 < (2 · 2) |
| 17 | 9, 8 | pm3.2i 475 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 18 | ltdivmul 12091 | . . . . . 6 ⊢ ((3 ∈ ℝ ∧ 2 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((3 / 2) < 2 ↔ 3 < (2 · 2))) | |
| 19 | 2, 9, 17, 18 | mp3an 1490 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ 3 < (2 · 2)) |
| 20 | 16, 19 | mpbir 234 | . . . 4 ⊢ (3 / 2) < 2 |
| 21 | df-2 12304 | . . . 4 ⊢ 2 = (1 + 1) | |
| 22 | 20, 21 | breqtri 5137 | . . 3 ⊢ (3 / 2) < (1 + 1) |
| 23 | 1z 12625 | . . . 4 ⊢ 1 ∈ ℤ | |
| 24 | flbi 13851 | . . . 4 ⊢ (((3 / 2) ∈ ℝ ∧ 1 ∈ ℤ) → ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1)))) | |
| 25 | 3, 23, 24 | mp2an 704 | . . 3 ⊢ ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1))) |
| 26 | 13, 22, 25 | mpbir2an 723 | . 2 ⊢ (⌊‘(3 / 2)) = 1 |
| 27 | 9 | renegcli 11520 | . . . 4 ⊢ -2 ∈ ℝ |
| 28 | 3 | renegcli 11520 | . . . 4 ⊢ -(3 / 2) ∈ ℝ |
| 29 | 3, 9 | ltnegi 11759 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ -2 < -(3 / 2)) |
| 30 | 20, 29 | mpbi 233 | . . . 4 ⊢ -2 < -(3 / 2) |
| 31 | 27, 28, 30 | ltleii 11334 | . . 3 ⊢ -2 ≤ -(3 / 2) |
| 32 | 4 | negcli 11527 | . . . . . . 7 ⊢ -2 ∈ ℂ |
| 33 | ax-1cn 11159 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 34 | negdi2 11517 | . . . . . . 7 ⊢ ((-2 ∈ ℂ ∧ 1 ∈ ℂ) → -(-2 + 1) = (--2 − 1)) | |
| 35 | 32, 33, 34 | mp2an 704 | . . . . . 6 ⊢ -(-2 + 1) = (--2 − 1) |
| 36 | 4 | negnegi 11529 | . . . . . . 7 ⊢ --2 = 2 |
| 37 | 36 | oveq1i 7422 | . . . . . 6 ⊢ (--2 − 1) = (2 − 1) |
| 38 | 35, 37 | eqtri 2786 | . . . . 5 ⊢ -(-2 + 1) = (2 − 1) |
| 39 | 2m1e1 12366 | . . . . . 6 ⊢ (2 − 1) = 1 | |
| 40 | 39, 12 | eqbrtri 5133 | . . . . 5 ⊢ (2 − 1) < (3 / 2) |
| 41 | 38, 40 | eqbrtri 5133 | . . . 4 ⊢ -(-2 + 1) < (3 / 2) |
| 42 | 27, 1 | readdcli 11225 | . . . . 5 ⊢ (-2 + 1) ∈ ℝ |
| 43 | 42, 3 | ltnegcon1i 11766 | . . . 4 ⊢ (-(-2 + 1) < (3 / 2) ↔ -(3 / 2) < (-2 + 1)) |
| 44 | 41, 43 | mpbi 233 | . . 3 ⊢ -(3 / 2) < (-2 + 1) |
| 45 | 2z 12627 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 46 | znegcl 12630 | . . . . 5 ⊢ (2 ∈ ℤ → -2 ∈ ℤ) | |
| 47 | 45, 46 | ax-mp 5 | . . . 4 ⊢ -2 ∈ ℤ |
| 48 | flbi 13851 | . . . 4 ⊢ ((-(3 / 2) ∈ ℝ ∧ -2 ∈ ℤ) → ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1)))) | |
| 49 | 28, 47, 48 | mp2an 704 | . . 3 ⊢ ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1))) |
| 50 | 31, 44, 49 | mpbir2an 723 | . 2 ⊢ (⌊‘-(3 / 2)) = -2 |
| 51 | 26, 50 | pm3.2i 475 | 1 ⊢ ((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 class class class wbr 5110 ‘cfv 6538 (class class class)co 7412 ℂcc 11099 ℝcr 11100 0cc0 11101 1c1 11102 + caddc 11104 · cmul 11106 < clt 11244 ≤ cle 11245 − cmin 11442 -cneg 11443 / cdiv 11872 2c2 12296 3c3 12297 4c4 12298 ℤcz 12592 ⌊cfl 13825 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-sup 9403 df-inf 9404 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-n0 12506 df-z 12593 df-uz 12864 df-fl 13827 |
| This theorem is referenced by: ex-ceil 30780 ppivalnn4 48362 |
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