| 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 12301 | . . . . 5 ⊢ 4 ∈ ℕ | |
| 2 | nnrecre 12255 | . . . . 5 ⊢ (4 ∈ ℕ → (1 / 4) ∈ ℝ) | |
| 3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ (1 / 4) ∈ ℝ |
| 4 | halfre 12434 | . . . 4 ⊢ (1 / 2) ∈ ℝ | |
| 5 | 2lt4 12395 | . . . . 5 ⊢ 2 < 4 | |
| 6 | 2re 12292 | . . . . . 6 ⊢ 2 ∈ ℝ | |
| 7 | 4re 12302 | . . . . . 6 ⊢ 4 ∈ ℝ | |
| 8 | 2pos 12322 | . . . . . 6 ⊢ 0 < 2 | |
| 9 | 4pos 12328 | . . . . . 6 ⊢ 0 < 4 | |
| 10 | 6, 7, 8, 9 | ltrecii 12108 | . . . . 5 ⊢ (2 < 4 ↔ (1 / 4) < (1 / 2)) |
| 11 | 5, 10 | mpbi 232 | . . . 4 ⊢ (1 / 4) < (1 / 2) |
| 12 | iccen 13501 | . . . 4 ⊢ (((1 / 4) ∈ ℝ ∧ (1 / 2) ∈ ℝ ∧ (1 / 4) < (1 / 2)) → (0[,]1) ≈ ((1 / 4)[,](1 / 2))) | |
| 13 | 3, 4, 11, 12 | mp3an 1482 | . . 3 ⊢ (0[,]1) ≈ ((1 / 4)[,](1 / 2)) |
| 14 | ovex 7429 | . . . 4 ⊢ (0(,)1) ∈ V | |
| 15 | 0xr 11229 | . . . . 5 ⊢ 0 ∈ ℝ* | |
| 16 | 1xr 11241 | . . . . 5 ⊢ 1 ∈ ℝ* | |
| 17 | 7, 9 | recgt0ii 12098 | . . . . 5 ⊢ 0 < (1 / 4) |
| 18 | halflt1 12438 | . . . . 5 ⊢ (1 / 2) < 1 | |
| 19 | iccssioo 13419 | . . . . 5 ⊢ (((0 ∈ ℝ* ∧ 1 ∈ ℝ*) ∧ (0 < (1 / 4) ∧ (1 / 2) < 1)) → ((1 / 4)[,](1 / 2)) ⊆ (0(,)1)) | |
| 20 | 15, 16, 17, 18, 19 | mp4an 703 | . . . 4 ⊢ ((1 / 4)[,](1 / 2)) ⊆ (0(,)1) |
| 21 | ssdomg 8981 | . . . 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 8993 | . . 3 ⊢ (((0[,]1) ≈ ((1 / 4)[,](1 / 2)) ∧ ((1 / 4)[,](1 / 2)) ≼ (0(,)1)) → (0[,]1) ≼ (0(,)1)) | |
| 24 | 13, 22, 23 | mp2an 702 | . 2 ⊢ (0[,]1) ≼ (0(,)1) |
| 25 | ovex 7429 | . . 3 ⊢ (0[,]1) ∈ V | |
| 26 | ioossicc 13437 | . . 3 ⊢ (0(,)1) ⊆ (0[,]1) | |
| 27 | ssdomg 8981 | . . 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 9069 | . 2 ⊢ (((0[,]1) ≼ (0(,)1) ∧ (0(,)1) ≼ (0[,]1)) → (0[,]1) ≈ (0(,)1)) | |
| 30 | 24, 28, 29 | mp2an 702 | 1 ⊢ (0[,]1) ≈ (0(,)1) |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2142 Vcvv 3454 ⊆ wss 3904 class class class wbr 5100 (class class class)co 7396 ≈ cen 8924 ≼ cdom 8925 ℝcr 11072 0cc0 11073 1c1 11074 ℝ*cxr 11215 < clt 11216 / cdiv 11844 ℕcn 12210 2c2 12272 4c4 12274 (,)cioo 13349 [,]cicc 13352 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 ax-pre-mulgt0 11150 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-sub 11416 df-neg 11417 df-div 11845 df-nn 12211 df-2 12280 df-3 12281 df-4 12282 df-rp 12994 df-ioo 13353 df-icc 13356 |
| This theorem is referenced by: (None) |
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