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Theorem indistps 7603
Description: The indiscrete topology on a set A expressed as a topological space. (Contributed by FL, 19-Jul-2006.)
Hypothesis
Ref Expression
indistop.1 |- A e. V
Assertion
Ref Expression
indistps |- <.A, {(/), A}>. e. TopSp

Proof of Theorem indistps
StepHypRef Expression
1 0ex 2706 . . . . 5 |- (/) e. V
2 indistop.1 . . . . 5 |- A e. V
31, 2unipr 2510 . . . 4 |- U.{(/), A} = ((/) u. A)
4 uncom 2172 . . . 4 |- ((/) u. A) = (A u. (/))
5 un0 2293 . . . 4 |- (A u. (/)) = A
63, 4, 53eqtr 1496 . . 3 |- U.{(/), A} = A
76opeq1i 2486 . 2 |- <.U.{(/), A}, {(/), A}>. = <.A, {(/), A}>.
82indistop 7598 . . 3 |- {(/), A} e. Top
9 eltopsp 7554 . . 3 |- (<.U.{(/), A}, {(/), A}>. e. TopSp <-> {(/), A} e. Top)
108, 9mpbir 190 . 2 |- <.U.{(/), A}, {(/), A}>. e. TopSp
117, 10eqeltrr 1542 1 |- <.A, {(/), A}>. e. TopSp
Colors of variables: wff set class
Syntax hints:   e. wcel 956  Vcvv 1807   u. cun 2041  (/)c0 2276  {cpr 2406  <.cop 2407  U.cuni 2498  Topctop 7538  TopSpctps 7539
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 960  ax-gen 961  ax-8 962  ax-10 964  ax-11 965  ax-12 966  ax-13 967  ax-14 968  ax-17 969  ax-4 971  ax-5o 973  ax-6o 976  ax-9o 1121  ax-10o 1138  ax-16 1208  ax-11o 1216  ax-ext 1457  ax-sep 2698  ax-nul 2705  ax-pow 2737  ax-pr 2774  ax-un 2861
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 979  df-sb 1170  df-eu 1380  df-mo 1381  df-clab 1462  df-cleq 1467  df-clel 1470  df-ne 1584  df-ral 1646  df-rex 1647  df-v 1808  df-dif 2045  df-un 2046  df-in 2047  df-ss 2049  df-nul 2277  df-pw 2398  df-sn 2408  df-pr 2409  df-op 2412  df-uni 2499  df-br 2615  df-opab 2662  df-xp 3179  df-rel 3180  df-top 7542  df-topsp 7543
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