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| Mirrors > Home > MPE Home > Th. List > ex-fl | Structured version Visualization version GIF version | ||
| Description: Example for df-fl 13912. 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 11289 | . . . 4 ⊢ 1 ∈ ℝ | |
| 2 | 3re 12404 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 3 | 2 | rehalfcli 12576 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 4 | 2cn 12399 | . . . . . . 7 ⊢ 2 ∈ ℂ | |
| 5 | 4 | mullidi 11295 | . . . . . 6 ⊢ (1 · 2) = 2 |
| 6 | 2lt3 12497 | . . . . . 6 ⊢ 2 < 3 | |
| 7 | 5, 6 | eqbrtri 5126 | . . . . 5 ⊢ (1 · 2) < 3 |
| 8 | 2pos 12428 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 2re 12398 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 10 | 1, 2, 9 | ltmuldivi 12218 | . . . . . 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 11414 | . . 3 ⊢ 1 ≤ (3 / 2) |
| 14 | 3lt4 12500 | . . . . . 6 ⊢ 3 < 4 | |
| 15 | 2t2e4 12487 | . . . . . 6 ⊢ (2 · 2) = 4 | |
| 16 | 14, 15 | breqtrri 5132 | . . . . 5 ⊢ 3 < (2 · 2) |
| 17 | 9, 8 | pm3.2i 476 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 18 | ltdivmul 12173 | . . . . . 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 12386 | . . . 4 ⊢ 2 = (1 + 1) | |
| 22 | 20, 21 | breqtri 5130 | . . 3 ⊢ (3 / 2) < (1 + 1) |
| 23 | 1z 12707 | . . . 4 ⊢ 1 ∈ ℤ | |
| 24 | flbi 13936 | . . . 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 11600 | . . . 4 ⊢ -2 ∈ ℝ |
| 28 | 3 | renegcli 11600 | . . . 4 ⊢ -(3 / 2) ∈ ℝ |
| 29 | 3, 9 | ltnegi 11841 | . . . . 5 ⊢ ((3 / 2) < 2 ↔ -2 < -(3 / 2)) |
| 30 | 20, 29 | mpbi 233 | . . . 4 ⊢ -2 < -(3 / 2) |
| 31 | 27, 28, 30 | ltleii 11414 | . . 3 ⊢ -2 ≤ -(3 / 2) |
| 32 | 4 | negcli 11607 | . . . . . . 7 ⊢ -2 ∈ ℂ |
| 33 | ax-1cn 11239 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 34 | negdi2 11597 | . . . . . . 7 ⊢ ((-2 ∈ ℂ ∧ 1 ∈ ℂ) → -(-2 + 1) = (--2 − 1)) | |
| 35 | 32, 33, 34 | mp2an 705 | . . . . . 6 ⊢ -(-2 + 1) = (--2 − 1) |
| 36 | 4 | negnegi 11609 | . . . . . . 7 ⊢ --2 = 2 |
| 37 | 36 | oveq1i 7422 | . . . . . 6 ⊢ (--2 − 1) = (2 − 1) |
| 38 | 35, 37 | eqtri 2784 | . . . . 5 ⊢ -(-2 + 1) = (2 − 1) |
| 39 | 2m1e1 12448 | . . . . . 6 ⊢ (2 − 1) = 1 | |
| 40 | 39, 12 | eqbrtri 5126 | . . . . 5 ⊢ (2 − 1) < (3 / 2) |
| 41 | 38, 40 | eqbrtri 5126 | . . . 4 ⊢ -(-2 + 1) < (3 / 2) |
| 42 | 27, 1 | readdcli 11305 | . . . . 5 ⊢ (-2 + 1) ∈ ℝ |
| 43 | 42, 3 | ltnegcon1i 11848 | . . . 4 ⊢ (-(-2 + 1) < (3 / 2) ↔ -(3 / 2) < (-2 + 1)) |
| 44 | 41, 43 | mpbi 233 | . . 3 ⊢ -(3 / 2) < (-2 + 1) |
| 45 | 2z 12709 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 46 | znegcl 12712 | . . . . 5 ⊢ (2 ∈ ℤ → -2 ∈ ℤ) | |
| 47 | 45, 46 | ax-mp 5 | . . . 4 ⊢ -2 ∈ ℤ |
| 48 | flbi 13936 | . . . 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 2145 class class class wbr 5103 ‘cfv 6531 (class class class)co 7412 ℂcc 11179 ℝcr 11180 0cc0 11181 1c1 11182 + caddc 11184 · cmul 11186 < clt 11324 ≤ cle 11325 − cmin 11522 -cneg 11523 / cdiv 11954 2c2 12378 3c3 12379 4c4 12380 ℤcz 12674 ⌊cfl 13910 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 ax-pre-sup 11259 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8701 df-en 8958 df-dom 8959 df-sdom 8960 df-sup 9418 df-inf 9419 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-n0 12588 df-z 12675 df-uz 12947 df-fl 13912 |
| This theorem is used by: ex-ceil 31031 ppivalnn4 48656 |
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