| Mathbox for Jim Kingdon |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iccioo01 | Structured version Visualization version GIF version | ||
| Description: The closed unit interval is equinumerous to the open unit interval. Based on a Mastodon post by Michael Kinyon. (Contributed by Jim Kingdon, 4-Jun-2024.) |
| Ref | Expression |
|---|---|
| iccioo01 | ⊢ (0[,]1) ≈ (0(,)1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4nn 12433 | . . . . 5 ⊢ 4 ∈ ℕ | |
| 2 | nnrecre 12387 | . . . . 5 ⊢ (4 ∈ ℕ → (1 / 4) ∈ ℝ) | |
| 3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ (1 / 4) ∈ ℝ |
| 4 | halfre 12566 | . . . 4 ⊢ (1 / 2) ∈ ℝ | |
| 5 | 2lt4 12527 | . . . . 5 ⊢ 2 < 4 | |
| 6 | 2re 12424 | . . . . . 6 ⊢ 2 ∈ ℝ | |
| 7 | 4re 12434 | . . . . . 6 ⊢ 4 ∈ ℝ | |
| 8 | 2pos 12454 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 4pos 12460 | . . . . . 6 ⊢ 0 < 4 | |
| 10 | 6, 7, 8, 9 | ltrecii 12240 | . . . . 5 ⊢ (2 < 4 ↔ (1 / 4) < (1 / 2)) |
| 11 | 5, 10 | mpbi 233 | . . . 4 ⊢ (1 / 4) < (1 / 2) |
| 12 | iccen 13635 | . . . 4 ⊢ (((1 / 4) ∈ ℝ ∧ (1 / 2) ∈ ℝ ∧ (1 / 4) < (1 / 2)) → (0[,]1) ≈ ((1 / 4)[,](1 / 2))) | |
| 13 | 3, 4, 11, 12 | mp3an 1490 | . . 3 ⊢ (0[,]1) ≈ ((1 / 4)[,](1 / 2)) |
| 14 | ovex 7457 | . . . 4 ⊢ (0(,)1) ∈ V | |
| 15 | 0xr 11363 | . . . . 5 ⊢ 0 ∈ ℝ* | |
| 16 | 1xr 11375 | . . . . 5 ⊢ 1 ∈ ℝ* | |
| 17 | 7, 9 | recgt0ii 12230 | . . . . 5 ⊢ 0 < (1 / 4) |
| 18 | halflt1 12570 | . . . . 5 ⊢ (1 / 2) < 1 | |
| 19 | iccssioo 13553 | . . . . 5 ⊢ (((0 ∈ ℝ* ∧ 1 ∈ ℝ*) ∧ (0 < (1 / 4) ∧ (1 / 2) < 1)) → ((1 / 4)[,](1 / 2)) ⊆ (0(,)1)) | |
| 20 | 15, 16, 17, 18, 19 | mp4an 706 | . . . 4 ⊢ ((1 / 4)[,](1 / 2)) ⊆ (0(,)1) |
| 21 | ssdomg 9035 | . . . 4 ⊢ ((0(,)1) ∈ V → (((1 / 4)[,](1 / 2)) ⊆ (0(,)1) → ((1 / 4)[,](1 / 2)) ≼ (0(,)1))) | |
| 22 | 14, 20, 21 | mp2 9 | . . 3 ⊢ ((1 / 4)[,](1 / 2)) ≼ (0(,)1) |
| 23 | endomtr 9047 | . . 3 ⊢ (((0[,]1) ≈ ((1 / 4)[,](1 / 2)) ∧ ((1 / 4)[,](1 / 2)) ≼ (0(,)1)) → (0[,]1) ≼ (0(,)1)) | |
| 24 | 13, 22, 23 | mp2an 705 | . 2 ⊢ (0[,]1) ≼ (0(,)1) |
| 25 | ovex 7457 | . . 3 ⊢ (0[,]1) ∈ V | |
| 26 | ioossicc 13571 | . . 3 ⊢ (0(,)1) ⊆ (0[,]1) | |
| 27 | ssdomg 9035 | . . 3 ⊢ ((0[,]1) ∈ V → ((0(,)1) ⊆ (0[,]1) → (0(,)1) ≼ (0[,]1))) | |
| 28 | 25, 26, 27 | mp2 9 | . 2 ⊢ (0(,)1) ≼ (0[,]1) |
| 29 | sbth 9124 | . 2 ⊢ (((0[,]1) ≼ (0(,)1) ∧ (0(,)1) ≼ (0[,]1)) → (0[,]1) ≈ (0(,)1)) | |
| 30 | 24, 28, 29 | mp2an 705 | 1 ⊢ (0[,]1) ≈ (0(,)1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 Vcvv 3450 ⊆ wss 3896 class class class wbr 5102 (class class class)co 7424 ≈ cen 8978 ≼ cdom 8979 ℝcr 11206 0cc0 11207 1c1 11208 ℝ*cxr 11349 < clt 11350 / cdiv 11980 ℕcn 12342 2c2 12404 4c4 12406 (,)cioo 13483 [,]cicc 13486 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-resscn 11264 ax-1cn 11265 ax-icn 11266 ax-addcl 11267 ax-addrcl 11268 ax-mulcl 11269 ax-mulrcl 11270 ax-mulcom 11271 ax-addass 11272 ax-mulass 11273 ax-distr 11274 ax-i2m1 11275 ax-1ne0 11276 ax-1rid 11277 ax-rnegex 11278 ax-rrecex 11279 ax-cnre 11280 ax-pre-lttri 11281 ax-pre-lttrn 11282 ax-pre-ltadd 11283 ax-pre-mulgt0 11284 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 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 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-1st 8005 df-2nd 8006 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-rdg 8426 df-er 8725 df-en 8982 df-dom 8983 df-sdom 8984 df-pnf 11352 df-mnf 11353 df-xr 11354 df-ltxr 11355 df-le 11356 df-sub 11550 df-neg 11551 df-div 11981 df-nn 12343 df-2 12412 df-3 12413 df-4 12414 df-rp 13128 df-ioo 13487 df-icc 13490 |
| This theorem is used by: (None) |
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