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| Mirrors > Home > MPE Home > Th. List > ex-fl | Structured version Visualization version GIF version | ||
| Description: Example for df-fl 13962. 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 11338 | . . . 4 ⊢ 1 ∈ ℝ | |
| 2 | 3re 12453 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 3 | 2 | rehalfcli 12625 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 4 | 2cn 12448 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
| 5 | 4 | mullidi 11344 | . . . . . 6 ⊢ (1 · 2) = 2 |
| 6 | 2lt3 12546 | . . . . . 6 ⊢ 2 < 3 | |
| 7 | 5, 6 | eqbrtri 5130 | . . . . 5 ⊢ (1 · 2) < 3 |
| 8 | 2pos 12477 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 2re 12447 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 10 | 1, 2, 9 | ltmuldivi 12267 | . . . . . 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 11463 | . . 3 ⊢ 1 ≤ (3 / 2) |
| 14 | 3lt4 12549 | . . . . . 6 ⊢ 3 < 4 | |
| 15 | 2t2e4 12536 | . . . . . 6 ⊢ (2 · 2) = 4 | |
| 16 | 14, 15 | breqtrri 5136 | . . . . 5 ⊢ 3 < (2 · 2) |
| 17 | 9, 8 | pm3.2i 476 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 18 | ltdivmul 12222 | . . . . . 6 ⊢ ((3 ∈ ℝ ∧ 2 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((3 / 2) < 2 ↔ 3 < (2 · 2))) | |
| 19 | 2, 9, 17, 18 | mp3an 1491 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ 3 < (2 · 2)) |
| 20 | 16, 19 | mpbir 234 | . . . 4 ⊢ (3 / 2) < 2 |
| 21 | df-2 12435 | . . . 4 ⊢ 2 = (1 + 1) | |
| 22 | 20, 21 | breqtri 5134 | . . 3 ⊢ (3 / 2) < (1 + 1) |
| 23 | 1z 12756 | . . . 4 ⊢ 1 ∈ ℤ | |
| 24 | flbi 13986 | . . . 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 11649 | . . . 4 ⊢ -2 ∈ ℝ |
| 28 | 3 | renegcli 11649 | . . . 4 ⊢ -(3 / 2) ∈ ℝ |
| 29 | 3, 9 | ltnegi 11890 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ -2 < -(3 / 2)) |
| 30 | 20, 29 | mpbi 233 | . . . 4 ⊢ -2 < -(3 / 2) |
| 31 | 27, 28, 30 | ltleii 11463 | . . 3 ⊢ -2 ≤ -(3 / 2) |
| 32 | 4 | negcli 11656 | . . . . . . 7 ⊢ -2 ∈ ℂ |
| 33 | ax-1cn 11288 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 34 | negdi2 11646 | . . . . . . 7 ⊢ (( -2 ∈ ℂ ∧ 1 ∈ ℂ) → -( -2 + 1) = ( - -2 − 1)) | |
| 35 | 32, 33, 34 | mp2an 705 | . . . . . 6 ⊢ -( -2 + 1) = ( - -2 − 1) |
| 36 | 4 | negnegi 11658 | . . . . . . 7 ⊢ - -2 = 2 |
| 37 | 36 | oveq1i 7456 | . . . . . 6 ⊢ ( - -2 − 1) = (2 − 1) |
| 38 | 35, 37 | eqtri 2786 | . . . . 5 ⊢ -( -2 + 1) = (2 − 1) |
| 39 | 2m1e1 12497 | . . . . . 6 ⊢ (2 − 1) = 1 | |
| 40 | 39, 12 | eqbrtri 5130 | . . . . 5 ⊢ (2 − 1) < (3 / 2) |
| 41 | 38, 40 | eqbrtri 5130 | . . . 4 ⊢ -( -2 + 1) < (3 / 2) |
| 42 | 27, 1 | readdcli 11354 | . . . . 5 ⊢ ( -2 + 1) ∈ ℝ |
| 43 | 42, 3 | ltnegcon1i 11897 | . . . 4 ⊢ ( -( -2 + 1) < (3 / 2) ↔ -(3 / 2) < ( -2 + 1)) |
| 44 | 41, 43 | mpbi 233 | . . 3 ⊢ -(3 / 2) < ( -2 + 1) |
| 45 | 2z 12758 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 46 | znegcl 12761 | . . . . 5 ⊢ (2 ∈ ℤ → -2 ∈ ℤ) | |
| 47 | 45, 46 | ax-mp 5 | . . . 4 ⊢ -2 ∈ ℤ |
| 48 | flbi 13986 | . . . 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 2147 class class class wbr 5106 ‘cfv 6561 (class class class)co 7446 ℂcc 11228 ℝcr 11229 0cc0 11230 1c1 11231 + caddc 11233 · cmul 11235 < clt 11373 ≤ cle 11374 − cmin 11571 -cneg 11572 / cdiv 12003 2c2 12427 3c3 12428 4c4 12429 ℤcz 12723 ⌊cfl 13960 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 ax-pre-mulgt0 11307 ax-pre-sup 11308 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-om 7905 df-2nd 8029 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-er 8748 df-en 9005 df-dom 9006 df-sdom 9007 df-sup 9464 df-inf 9465 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-sub 11573 df-neg 11574 df-div 12004 df-nn 12366 df-2 12435 df-3 12436 df-4 12437 df-n0 12637 df-z 12724 df-uz 12996 df-fl 13962 |
| This theorem is used by: ex-ceil 31082 ppivalnn4 48927 |
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