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Theorem islp 7694
Description: The predicate "P is a limit point of S."
Hypothesis
Ref Expression
lpfval.1 |- X = U.J
Assertion
Ref Expression
islp |- ((J e. Top /\ S (_ X) -> (P e. ((limPt` J)` S) <-> P e. ((cls` J)` (S \ {P}))))

Proof of Theorem islp
StepHypRef Expression
1 lpfval.1 . . . 4 |- X = U.J
21lpval 7693 . . 3 |- ((J e. Top /\ S (_ X) -> ((limPt` J)` S) = {x | x e. ((cls` J)` (S \ {x}))})
32eleq2d 1538 . 2 |- ((J e. Top /\ S (_ X) -> (P e. ((limPt` J)` S) <-> P e. {x | x e. ((cls` J)` (S \ {x}))}))
4 elisset 1813 . . 3 |- (P e. ((cls`
J)` (S \ {P})) -> P e. V)
5 id 59 . . . 4 |- (x = P -> x = P)
6 sneq 2413 . . . . . 6 |- (x = P -> {x} = {P})
76difeq2d 2155 . . . . 5 |- (x = P -> (S \ {x}) = (S \ {P}))
87fveq2d 3719 . . . 4 |- (x = P -> ((cls` J)` (S \ {x})) = ((cls`
J)` (S \ {P})))
95, 8eleq12d 1539 . . 3 |- (x = P -> (x e. ((cls` J)` (S \ {x})) <-> P e. ((cls` J)` (S \ {P}))))
104, 9elab3 1899 . 2 |- (P e. {x | x e. ((cls` J)` (S \ {x}))} <-> P e. ((cls` J)` (S \ {P})))
113, 10syl6bb 535 1 |- ((J e. Top /\ S (_ X) -> (P e. ((limPt` J)` S) <-> P e. ((cls` J)` (S \ {P}))))
Colors of variables: wff set class
Syntax hints:   -> wi 3   <-> wb 146   /\ wa 223   = wceq 954   e. wcel 956  {cab 1461   \ cdif 2040   (_ wss 2043  {csn 2405  U.cuni 2498  ` cfv 3177  Topctop 7538  clsccl 7612  limPtclp 7690
This theorem is referenced by:  islp2 7697
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-9 963  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-rep 2688  ax-sep 2698  ax-pow 2737  ax-pr 2774  ax-un 2861
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3an 776  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-rab 1649  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-int 2529  df-br 2615  df-opab 2662  df-id 2830  df-xp 3179  df-rel 3180  df-cnv 3181  df-co 3182  df-dm 3183  df-rn 3184  df-res 3185  df-ima 3186  df-fun 3187  df-fn 3188  df-fv 3193  df-top 7542  df-cld 7613  df-cls 7615  df-lp 7691
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