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| Mirrors > Home > MPE Home > Th. List > ex-fl | Structured version Visualization version GIF version | ||
| Description: Example for df-fl 13845. 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 11226 | . . . 4 ⊢ 1 ∈ ℝ | |
| 2 | 3re 12339 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 3 | 2 | rehalfcli 12511 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 4 | 2cn 12334 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
| 5 | 4 | mullidi 11232 | . . . . . 6 ⊢ (1 · 2) = 2 |
| 6 | 2lt3 12432 | . . . . . 6 ⊢ 2 < 3 | |
| 7 | 5, 6 | eqbrtri 5137 | . . . . 5 ⊢ (1 · 2) < 3 |
| 8 | 2pos 12363 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 2re 12333 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 10 | 1, 2, 9 | ltmuldivi 12153 | . . . . . 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 11351 | . . 3 ⊢ 1 ≤ (3 / 2) |
| 14 | 3lt4 12435 | . . . . . 6 ⊢ 3 < 4 | |
| 15 | 2t2e4 12422 | . . . . . 6 ⊢ (2 · 2) = 4 | |
| 16 | 14, 15 | breqtrri 5143 | . . . . 5 ⊢ 3 < (2 · 2) |
| 17 | 9, 8 | pm3.2i 476 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 18 | ltdivmul 12108 | . . . . . 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 12321 | . . . 4 ⊢ 2 = (1 + 1) | |
| 22 | 20, 21 | breqtri 5141 | . . 3 ⊢ (3 / 2) < (1 + 1) |
| 23 | 1z 12642 | . . . 4 ⊢ 1 ∈ ℤ | |
| 24 | flbi 13869 | . . . 4 ⊢ (((3 / 2) ∈ ℝ ∧ 1 ∈ ℤ) → ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1)))) | |
| 25 | 3, 23, 24 | mp2an 705 | . . 3 ⊢ ((⌊‘(3 / 2)) = 1 ↔ (1 ≤ (3 / 2) ∧ (3 / 2) < (1 + 1))) |
| 26 | 13, 22, 25 | mpbir2an 724 | . 2 ⊢ (⌊‘(3 / 2)) = 1 |
| 27 | 9 | renegcli 11537 | . . . 4 ⊢ -2 ∈ ℝ |
| 28 | 3 | renegcli 11537 | . . . 4 ⊢ -(3 / 2) ∈ ℝ |
| 29 | 3, 9 | ltnegi 11776 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ -2 < -(3 / 2)) |
| 30 | 20, 29 | mpbi 233 | . . . 4 ⊢ -2 < -(3 / 2) |
| 31 | 27, 28, 30 | ltleii 11351 | . . 3 ⊢ -2 ≤ -(3 / 2) |
| 32 | 4 | negcli 11544 | . . . . . . 7 ⊢ -2 ∈ ℂ |
| 33 | ax-1cn 11176 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 34 | negdi2 11534 | . . . . . . 7 ⊢ ((-2 ∈ ℂ ∧ 1 ∈ ℂ) → -(-2 + 1) = (--2 − 1)) | |
| 35 | 32, 33, 34 | mp2an 705 | . . . . . 6 ⊢ -(-2 + 1) = (--2 − 1) |
| 36 | 4 | negnegi 11546 | . . . . . . 7 ⊢ --2 = 2 |
| 37 | 36 | oveq1i 7433 | . . . . . 6 ⊢ (--2 − 1) = (2 − 1) |
| 38 | 35, 37 | eqtri 2789 | . . . . 5 ⊢ -(-2 + 1) = (2 − 1) |
| 39 | 2m1e1 12383 | . . . . . 6 ⊢ (2 − 1) = 1 | |
| 40 | 39, 12 | eqbrtri 5137 | . . . . 5 ⊢ (2 − 1) < (3 / 2) |
| 41 | 38, 40 | eqbrtri 5137 | . . . 4 ⊢ -(-2 + 1) < (3 / 2) |
| 42 | 27, 1 | readdcli 11242 | . . . . 5 ⊢ (-2 + 1) ∈ ℝ |
| 43 | 42, 3 | ltnegcon1i 11783 | . . . 4 ⊢ (-(-2 + 1) < (3 / 2) ↔ -(3 / 2) < (-2 + 1)) |
| 44 | 41, 43 | mpbi 233 | . . 3 ⊢ -(3 / 2) < (-2 + 1) |
| 45 | 2z 12644 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 46 | znegcl 12647 | . . . . 5 ⊢ (2 ∈ ℤ → -2 ∈ ℤ) | |
| 47 | 45, 46 | ax-mp 5 | . . . 4 ⊢ -2 ∈ ℤ |
| 48 | flbi 13869 | . . . 4 ⊢ ((-(3 / 2) ∈ ℝ ∧ -2 ∈ ℤ) → ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1)))) | |
| 49 | 28, 47, 48 | mp2an 705 | . . 3 ⊢ ((⌊‘-(3 / 2)) = -2 ↔ (-2 ≤ -(3 / 2) ∧ -(3 / 2) < (-2 + 1))) |
| 50 | 31, 44, 49 | mpbir2an 724 | . 2 ⊢ (⌊‘-(3 / 2)) = -2 |
| 51 | 26, 50 | pm3.2i 476 | 1 ⊢ ((⌊‘(3 / 2)) = 1 ∧ (⌊‘-(3 / 2)) = -2) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2146 class class class wbr 5114 ‘cfv 6543 (class class class)co 7423 ℂcc 11116 ℝcr 11117 0cc0 11118 1c1 11119 + caddc 11121 · cmul 11123 < clt 11261 ≤ cle 11262 − cmin 11459 -cneg 11460 / cdiv 11889 2c2 12313 3c3 12314 4c4 12315 ℤcz 12609 ⌊cfl 13843 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 ax-pre-sup 11196 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-sup 9412 df-inf 9413 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-div 11890 df-nn 12252 df-2 12321 df-3 12322 df-4 12323 df-n0 12523 df-z 12610 df-uz 12881 df-fl 13845 |
| This theorem is used by: ex-ceil 30836 ppivalnn4 48420 |
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