| 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 12349 | . . . . 5 ⊢ 4 ∈ ℕ | |
| 2 | nnrecre 12303 | . . . . 5 ⊢ (4 ∈ ℕ → (1 / 4) ∈ ℝ) | |
| 3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ (1 / 4) ∈ ℝ |
| 4 | halfre 12482 | . . . 4 ⊢ (1 / 2) ∈ ℝ | |
| 5 | 2lt4 12443 | . . . . 5 ⊢ 2 < 4 | |
| 6 | 2re 12340 | . . . . . 6 ⊢ 2 ∈ ℝ | |
| 7 | 4re 12350 | . . . . . 6 ⊢ 4 ∈ ℝ | |
| 8 | 2pos 12370 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 4pos 12376 | . . . . . 6 ⊢ 0 < 4 | |
| 10 | 6, 7, 8, 9 | ltrecii 12156 | . . . . 5 ⊢ (2 < 4 ↔ (1 / 4) < (1 / 2)) |
| 11 | 5, 10 | mpbi 233 | . . . 4 ⊢ (1 / 4) < (1 / 2) |
| 12 | iccen 13551 | . . . 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 7447 | . . . 4 ⊢ (0(,)1) ∈ V | |
| 15 | 0xr 11281 | . . . . 5 ⊢ 0 ∈ ℝ* | |
| 16 | 1xr 11293 | . . . . 5 ⊢ 1 ∈ ℝ* | |
| 17 | 7, 9 | recgt0ii 12146 | . . . . 5 ⊢ 0 < (1 / 4) |
| 18 | halflt1 12486 | . . . . 5 ⊢ (1 / 2) < 1 | |
| 19 | iccssioo 13469 | . . . . 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 9007 | . . . 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 9019 | . . 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 7447 | . . 3 ⊢ (0[,]1) ∈ V | |
| 26 | ioossicc 13487 | . . 3 ⊢ (0(,)1) ⊆ (0[,]1) | |
| 27 | ssdomg 9007 | . . 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 9096 | . 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 2145 Vcvv 3450 ⊆ wss 3899 class class class wbr 5103 (class class class)co 7414 ≈ cen 8950 ≼ cdom 8951 ℝcr 11124 0cc0 11125 1c1 11126 ℝ*cxr 11267 < clt 11268 / cdiv 11896 ℕcn 12258 2c2 12320 4c4 12322 (,)cioo 13399 [,]cicc 13402 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 |
| 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 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 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 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8697 df-en 8954 df-dom 8955 df-sdom 8956 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-div 11897 df-nn 12259 df-2 12328 df-3 12329 df-4 12330 df-rp 13044 df-ioo 13403 df-icc 13406 |
| This theorem is used by: (None) |
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