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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 12347 | . . . . 5 ⊢ 4 ∈ ℕ | |
2 | nnrecre 12306 | . . . . 5 ⊢ (4 ∈ ℕ → (1 / 4) ∈ ℝ) | |
3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ (1 / 4) ∈ ℝ |
4 | halfre 12478 | . . . 4 ⊢ (1 / 2) ∈ ℝ | |
5 | 2lt4 12439 | . . . . 5 ⊢ 2 < 4 | |
6 | 2re 12338 | . . . . . 6 ⊢ 2 ∈ ℝ | |
7 | 4re 12348 | . . . . . 6 ⊢ 4 ∈ ℝ | |
8 | 2pos 12367 | . . . . . 6 ⊢ 0 < 2 | |
9 | 4pos 12371 | . . . . . 6 ⊢ 0 < 4 | |
10 | 6, 7, 8, 9 | ltrecii 12182 | . . . . 5 ⊢ (2 < 4 ↔ (1 / 4) < (1 / 2)) |
11 | 5, 10 | mpbi 230 | . . . 4 ⊢ (1 / 4) < (1 / 2) |
12 | iccen 13534 | . . . 4 ⊢ (((1 / 4) ∈ ℝ ∧ (1 / 2) ∈ ℝ ∧ (1 / 4) < (1 / 2)) → (0[,]1) ≈ ((1 / 4)[,](1 / 2))) | |
13 | 3, 4, 11, 12 | mp3an 1460 | . . 3 ⊢ (0[,]1) ≈ ((1 / 4)[,](1 / 2)) |
14 | ovex 7464 | . . . 4 ⊢ (0(,)1) ∈ V | |
15 | 0xr 11306 | . . . . 5 ⊢ 0 ∈ ℝ* | |
16 | 1xr 11318 | . . . . 5 ⊢ 1 ∈ ℝ* | |
17 | 7, 9 | recgt0ii 12172 | . . . . 5 ⊢ 0 < (1 / 4) |
18 | halflt1 12482 | . . . . 5 ⊢ (1 / 2) < 1 | |
19 | iccssioo 13453 | . . . . 5 ⊢ (((0 ∈ ℝ* ∧ 1 ∈ ℝ*) ∧ (0 < (1 / 4) ∧ (1 / 2) < 1)) → ((1 / 4)[,](1 / 2)) ⊆ (0(,)1)) | |
20 | 15, 16, 17, 18, 19 | mp4an 693 | . . . 4 ⊢ ((1 / 4)[,](1 / 2)) ⊆ (0(,)1) |
21 | ssdomg 9039 | . . . 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 9051 | . . 3 ⊢ (((0[,]1) ≈ ((1 / 4)[,](1 / 2)) ∧ ((1 / 4)[,](1 / 2)) ≼ (0(,)1)) → (0[,]1) ≼ (0(,)1)) | |
24 | 13, 22, 23 | mp2an 692 | . 2 ⊢ (0[,]1) ≼ (0(,)1) |
25 | ovex 7464 | . . 3 ⊢ (0[,]1) ∈ V | |
26 | ioossicc 13470 | . . 3 ⊢ (0(,)1) ⊆ (0[,]1) | |
27 | ssdomg 9039 | . . 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 9132 | . 2 ⊢ (((0[,]1) ≼ (0(,)1) ∧ (0(,)1) ≼ (0[,]1)) → (0[,]1) ≈ (0(,)1)) | |
30 | 24, 28, 29 | mp2an 692 | 1 ⊢ (0[,]1) ≈ (0(,)1) |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 Vcvv 3478 ⊆ wss 3963 class class class wbr 5148 (class class class)co 7431 ≈ cen 8981 ≼ cdom 8982 ℝcr 11152 0cc0 11153 1c1 11154 ℝ*cxr 11292 < clt 11293 / cdiv 11918 ℕcn 12264 2c2 12319 4c4 12321 (,)cioo 13384 [,]cicc 13387 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-cnex 11209 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-we 5643 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8013 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-div 11919 df-nn 12265 df-2 12327 df-3 12328 df-4 12329 df-rp 13033 df-ioo 13388 df-icc 13391 |
This theorem is referenced by: (None) |
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