| 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 12426 | . . . . 5 ⊢ 4 ∈ ℕ | |
| 2 | nnrecre 12380 | . . . . 5 ⊢ (4 ∈ ℕ → (1 / 4) ∈ ℝ) | |
| 3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ (1 / 4) ∈ ℝ |
| 4 | halfre 12559 | . . . 4 ⊢ (1 / 2) ∈ ℝ | |
| 5 | 2lt4 12520 | . . . . 5 ⊢ 2 < 4 | |
| 6 | 2re 12417 | . . . . . 6 ⊢ 2 ∈ ℝ | |
| 7 | 4re 12427 | . . . . . 6 ⊢ 4 ∈ ℝ | |
| 8 | 2pos 12447 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 4pos 12453 | . . . . . 6 ⊢ 0 < 4 | |
| 10 | 6, 7, 8, 9 | ltrecii 12233 | . . . . 5 ⊢ (2 < 4 ↔ (1 / 4) < (1 / 2)) |
| 11 | 5, 10 | mpbi 233 | . . . 4 ⊢ (1 / 4) < (1 / 2) |
| 12 | iccen 13628 | . . . 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 7453 | . . . 4 ⊢ (0(,)1) ∈ V | |
| 15 | 0xr 11356 | . . . . 5 ⊢ 0 ∈ ℝ* | |
| 16 | 1xr 11368 | . . . . 5 ⊢ 1 ∈ ℝ* | |
| 17 | 7, 9 | recgt0ii 12223 | . . . . 5 ⊢ 0 < (1 / 4) |
| 18 | halflt1 12563 | . . . . 5 ⊢ (1 / 2) < 1 | |
| 19 | iccssioo 13546 | . . . . 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 9027 | . . . 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 9039 | . . 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 7453 | . . 3 ⊢ (0[,]1) ∈ V | |
| 26 | ioossicc 13564 | . . 3 ⊢ (0(,)1) ⊆ (0[,]1) | |
| 27 | ssdomg 9027 | . . 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 9116 | . 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 3451 ⊆ wss 3899 class class class wbr 5103 (class class class)co 7420 ≈ cen 8970 ≼ cdom 8971 ℝcr 11199 0cc0 11200 1c1 11201 ℝ*cxr 11342 < clt 11343 / cdiv 11973 ℕcn 12335 2c2 12397 4c4 12399 (,)cioo 13476 [,]cicc 13479 |
| 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 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-div 11974 df-nn 12336 df-2 12405 df-3 12406 df-4 12407 df-rp 13121 df-ioo 13480 df-icc 13483 |
| This theorem is used by: (None) |
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