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| Mirrors > Home > MPE Home > Th. List > indistpsx | Structured version Visualization version GIF version | ||
| Description: The indiscrete topology on a set 𝐴 expressed as a topological space, using explicit structure component references. Compare with indistps 23356 and indistps2 23357. The advantage of this version is that the actual function for the structure is evident, and df-ndx 17398 is not needed, nor any other special definition outside of basic set theory. The disadvantage is that if the indices of the component definitions df-base 17414 and df-tset 17473 are changed in the future, this theorem will also have to be changed. Note: This theorem has hard-coded structure indices for demonstration purposes. It is not intended for general use; use indistps 23356 instead. (New usage is discouraged.) (Contributed by FL, 19-Jul-2006.) |
| Ref | Expression |
|---|---|
| indistpsx.a | ⊢ 𝐴 ∈ V |
| indistpsx.k | ⊢ 𝐾 = {〈1, 𝐴〉, 〈9, {∅, 𝐴}〉} |
| Ref | Expression |
|---|---|
| indistpsx | ⊢ 𝐾 ∈ TopSp |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | indistpsx.k | . . 3 ⊢ 𝐾 = {〈1, 𝐴〉, 〈9, {∅, 𝐴}〉} | |
| 2 | basendx 17422 | . . . . 5 ⊢ (Base‘ndx) = 1 | |
| 3 | 2 | opeq1i 4846 | . . . 4 ⊢ 〈(Base‘ndx), 𝐴〉 = 〈1, 𝐴〉 |
| 4 | tsetndx 17549 | . . . . 5 ⊢ (TopSet‘ndx) = 9 | |
| 5 | 4 | opeq1i 4846 | . . . 4 ⊢ 〈(TopSet‘ndx), {∅, 𝐴}〉 = 〈9, {∅, 𝐴}〉 |
| 6 | 3, 5 | preq12i 4699 | . . 3 ⊢ {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), {∅, 𝐴}〉} = {〈1, 𝐴〉, 〈9, {∅, 𝐴}〉} |
| 7 | 1, 6 | eqtr4i 2789 | . 2 ⊢ 𝐾 = {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), {∅, 𝐴}〉} |
| 8 | indistpsx.a | . . . 4 ⊢ 𝐴 ∈ V | |
| 9 | indistopon 23346 | . . . 4 ⊢ (𝐴 ∈ V → {∅, 𝐴} ∈ (TopOn‘𝐴)) | |
| 10 | 8, 9 | ax-mp 5 | . . 3 ⊢ {∅, 𝐴} ∈ (TopOn‘𝐴) |
| 11 | 10 | toponunii 23261 | . 2 ⊢ 𝐴 = ∪ {∅, 𝐴} |
| 12 | indistop 23347 | . 2 ⊢ {∅, 𝐴} ∈ Top | |
| 13 | 7, 11, 12 | eltpsi 23289 | 1 ⊢ 𝐾 ∈ TopSp |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2147 Vcvv 3454 ∅c0 4281 {cpr 4590 〈cop 4838 ‘cfv 6555 1c1 11225 9c9 12428 ndxcnx 17397 Basecbs 17413 TopSetcts 17460 TopOnctopon 23255 TopSpctps 23277 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-1st 8022 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-1o 8501 df-er 8742 df-en 8999 df-dom 9000 df-sdom 9001 df-fin 9002 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-nn 12360 df-2 12429 df-3 12430 df-4 12431 df-5 12432 df-6 12433 df-7 12434 df-8 12435 df-9 12436 df-n0 12631 df-z 12718 df-uz 12990 df-fz 13664 df-struct 17351 df-slot 17386 df-ndx 17398 df-base 17414 df-tset 17473 df-rest 17619 df-topn 17620 df-top 23239 df-topon 23256 df-topsp 23278 |
| This theorem is used by: (None) |
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