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| Mirrors > Home > MPE Home > Th. List > indistps | Structured version Visualization version GIF version | ||
| Description: The indiscrete topology on a set 𝐴 expressed as a topological space, using implicit structure indices. The advantage of this version over indistpsx 23289 is that it is independent of the indices of the component definitions df-base 17349 and df-tset 17408, and if they are changed in the future, this theorem will not be affected. The advantage over indistps2 23291 is that it is easy to eliminate the hypotheses with eqid 2760 and vtoclg 3517 to result in a closed theorem. Theorems indistpsALT 23292 and indistps2ALT 23293 show that the two forms can be derived from each other. (Contributed by FL, 19-Jul-2006.) |
| Ref | Expression |
|---|---|
| indistps.a | ⊢ 𝐴 ∈ V |
| indistps.k | ⊢ 𝐾 = {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), {∅, 𝐴}〉} |
| Ref | Expression |
|---|---|
| indistps | ⊢ 𝐾 ∈ TopSp |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | indistps.k | . 2 ⊢ 𝐾 = {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), {∅, 𝐴}〉} | |
| 2 | 0ex 5260 | . . . 4 ⊢ ∅ ∈ V | |
| 3 | indistps.a | . . . 4 ⊢ 𝐴 ∈ V | |
| 4 | 2, 3 | unipr 4883 | . . 3 ⊢ ∪ {∅, 𝐴} = (∅ ∪ 𝐴) |
| 5 | uncom 4104 | . . 3 ⊢ (∅ ∪ 𝐴) = (𝐴 ∪ ∅) | |
| 6 | un0 4343 | . . 3 ⊢ (𝐴 ∪ ∅) = 𝐴 | |
| 7 | 4, 5, 6 | 3eqtrri 2788 | . 2 ⊢ 𝐴 = ∪ {∅, 𝐴} |
| 8 | indistop 23281 | . 2 ⊢ {∅, 𝐴} ∈ Top | |
| 9 | 1, 7, 8 | eltpsi 23223 | 1 ⊢ 𝐾 ∈ TopSp |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2145 Vcvv 3450 ∪ cun 3896 ∅c0 4278 {cpr 4585 〈cop 4589 ∪ cuni 4866 ‘cfv 6527 ndxcnx 17332 Basecbs 17348 TopSetcts 17395 TopSpctps 23211 |
| 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-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-cnex 11227 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 ax-pre-mulgt0 11248 |
| 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-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 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 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8454 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-fin 8955 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-nn 12305 df-2 12374 df-3 12375 df-4 12376 df-5 12377 df-6 12378 df-7 12379 df-8 12380 df-9 12381 df-n0 12576 df-z 12663 df-uz 12935 df-fz 13609 df-struct 17286 df-slot 17321 df-ndx 17333 df-base 17349 df-tset 17408 df-rest 17554 df-topn 17555 df-top 23173 df-topon 23190 df-topsp 23212 |
| This theorem is used by: (None) |
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