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Mirrors > Home > MPE Home > Th. List > indistpsALT | Structured version Visualization version GIF version |
Description: The indiscrete topology on a set 𝐴 expressed as a topological space. Here we show how to derive the structural version indistps 22869 from the direct component assignment version indistps2 22870. (Contributed by NM, 24-Oct-2012.) (Revised by AV, 31-Oct-2024.) (New usage is discouraged.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
indistpsALT.a | ⊢ 𝐴 ∈ V |
indistpsALT.k | ⊢ 𝐾 = {⟨(Base‘ndx), 𝐴⟩, ⟨(TopSet‘ndx), {∅, 𝐴}⟩} |
Ref | Expression |
---|---|
indistpsALT | ⊢ 𝐾 ∈ TopSp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | indistpsALT.a | . 2 ⊢ 𝐴 ∈ V | |
2 | indistopon 22859 | . 2 ⊢ (𝐴 ∈ V → {∅, 𝐴} ∈ (TopOn‘𝐴)) | |
3 | indistpsALT.k | . . . . 5 ⊢ 𝐾 = {⟨(Base‘ndx), 𝐴⟩, ⟨(TopSet‘ndx), {∅, 𝐴}⟩} | |
4 | basendxlttsetndx 17309 | . . . . 5 ⊢ (Base‘ndx) < (TopSet‘ndx) | |
5 | tsetndxnn 17308 | . . . . 5 ⊢ (TopSet‘ndx) ∈ ℕ | |
6 | 3, 4, 5 | 2strbas1 17180 | . . . 4 ⊢ (𝐴 ∈ V → 𝐴 = (Base‘𝐾)) |
7 | 1, 6 | ax-mp 5 | . . 3 ⊢ 𝐴 = (Base‘𝐾) |
8 | prex 5425 | . . . 4 ⊢ {∅, 𝐴} ∈ V | |
9 | tsetid 17307 | . . . . 5 ⊢ TopSet = Slot (TopSet‘ndx) | |
10 | 3, 4, 5, 9 | 2strop1 17181 | . . . 4 ⊢ ({∅, 𝐴} ∈ V → {∅, 𝐴} = (TopSet‘𝐾)) |
11 | 8, 10 | ax-mp 5 | . . 3 ⊢ {∅, 𝐴} = (TopSet‘𝐾) |
12 | 7, 11 | tsettps 22798 | . 2 ⊢ ({∅, 𝐴} ∈ (TopOn‘𝐴) → 𝐾 ∈ TopSp) |
13 | 1, 2, 12 | mp2b 10 | 1 ⊢ 𝐾 ∈ TopSp |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ∈ wcel 2098 Vcvv 3468 ∅c0 4317 {cpr 4625 ⟨cop 4629 ‘cfv 6537 ndxcnx 17135 Basecbs 17153 TopSetcts 17212 TopOnctopon 22767 TopSpctps 22789 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13491 df-struct 17089 df-slot 17124 df-ndx 17136 df-base 17154 df-tset 17225 df-rest 17377 df-topn 17378 df-top 22751 df-topon 22768 df-topsp 22790 |
This theorem is referenced by: (None) |
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