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| Mirrors > Home > MPE Home > Th. List > 3halfnz | Structured version Visualization version GIF version | ||
| Description: Three halves is not an integer. (Contributed by AV, 2-Jun-2020.) |
| Ref | Expression |
|---|---|
| 3halfnz | ⊢ ¬ (3 / 2) ∈ ℤ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1z 12555 | . 2 ⊢ 1 ∈ ℤ | |
| 2 | 2cn 12254 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 3 | 2 | mullidi 11148 | . . . 4 ⊢ (1 · 2) = 2 |
| 4 | 2lt3 12346 | . . . 4 ⊢ 2 < 3 | |
| 5 | 3, 4 | eqbrtri 5100 | . . 3 ⊢ (1 · 2) < 3 |
| 6 | 1re 11142 | . . . 4 ⊢ 1 ∈ ℝ | |
| 7 | 3re 12259 | . . . 4 ⊢ 3 ∈ ℝ | |
| 8 | 2re 12253 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 9 | 2pos 12282 | . . . . 5 ⊢ 0 < 2 | |
| 10 | 8, 9 | pm3.2i 471 | . . . 4 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
| 11 | ltmuldiv 12027 | . . . 4 ⊢ ((1 ∈ ℝ ∧ 3 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((1 · 2) < 3 ↔ 1 < (3 / 2))) | |
| 12 | 6, 7, 10, 11 | mp3an 1469 | . . 3 ⊢ ((1 · 2) < 3 ↔ 1 < (3 / 2)) |
| 13 | 5, 12 | mpbi 231 | . 2 ⊢ 1 < (3 / 2) |
| 14 | 3lt4 12348 | . . . 4 ⊢ 3 < 4 | |
| 15 | 2t2e4 12338 | . . . . 5 ⊢ (2 · 2) = 4 | |
| 16 | 15 | breq2i 5087 | . . . 4 ⊢ (3 < (2 · 2) ↔ 3 < 4) |
| 17 | 14, 16 | mpbir 232 | . . 3 ⊢ 3 < (2 · 2) |
| 18 | 1p1e2 12299 | . . . . 5 ⊢ (1 + 1) = 2 | |
| 19 | 18 | breq2i 5087 | . . . 4 ⊢ ((3 / 2) < (1 + 1) ↔ (3 / 2) < 2) |
| 20 | ltdivmul 12029 | . . . . 5 ⊢ ((3 ∈ ℝ ∧ 2 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((3 / 2) < 2 ↔ 3 < (2 · 2))) | |
| 21 | 7, 8, 10, 20 | mp3an 1469 | . . . 4 ⊢ ((3 / 2) < 2 ↔ 3 < (2 · 2)) |
| 22 | 19, 21 | bitri 276 | . . 3 ⊢ ((3 / 2) < (1 + 1) ↔ 3 < (2 · 2)) |
| 23 | 17, 22 | mpbir 232 | . 2 ⊢ (3 / 2) < (1 + 1) |
| 24 | btwnnz 12603 | . 2 ⊢ ((1 ∈ ℤ ∧ 1 < (3 / 2) ∧ (3 / 2) < (1 + 1)) → ¬ (3 / 2) ∈ ℤ) | |
| 25 | 1, 13, 23, 24 | mp3an 1469 | 1 ⊢ ¬ (3 / 2) ∈ ℤ |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 207 ∧ wa 396 ∈ wcel 2119 class class class wbr 5079 (class class class)co 7363 ℝcr 11035 0cc0 11036 1c1 11037 + caddc 11039 · cmul 11041 < clt 11177 / cdiv 11805 2c2 12234 3c3 12235 4c4 12236 ℤcz 12522 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-om 7814 df-2nd 7939 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-div 11806 df-nn 12173 df-2 12242 df-3 12243 df-4 12244 df-n0 12436 df-z 12523 |
| This theorem is referenced by: n2dvds3 16338 nn0o1gt2 16348 |
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