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Theorem ntrss3 7689
Description: The interior of a subset of a topological space is included in the space.
Hypothesis
Ref Expression
clscld.1 |- X = U.J
Assertion
Ref Expression
ntrss3 |- ((J e. Top /\ S (_ X) -> ((int` J)` S) (_ X)

Proof of Theorem ntrss3
StepHypRef Expression
1 clscld.1 . . 3 |- X = U.J
21ntropn 7681 . 2 |- ((J e. Top /\ S (_ X) -> ((int` J)` S) e. J)
31eltopss 7604 . 2 |- ((J e. Top /\ ((int` J)` S) e. J) -> ((int` J)` S) (_ X)
42, 3syldan 469 1 |- ((J e. Top /\ S (_ X) -> ((int` J)` S) (_ X)
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   = wceq 958   e. wcel 960   (_ wss 2050  U.cuni 2507  ` cfv 3188  Topctop 7590  intcnt 7658
This theorem is referenced by:  ntridm 7696
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 964  ax-gen 965  ax-8 966  ax-9 967  ax-10 968  ax-11 969  ax-12 970  ax-13 971  ax-14 972  ax-17 973  ax-4 975  ax-5o 977  ax-6o 980  ax-9o 1125  ax-10o 1142  ax-16 1212  ax-11o 1220  ax-ext 1462  ax-rep 2698  ax-sep 2708  ax-pow 2748  ax-pr 2785  ax-un 2872
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 983  df-sb 1174  df-eu 1384  df-mo 1385  df-clab 1467  df-cleq 1472  df-clel 1475  df-ne 1590  df-ral 1652  df-rex 1653  df-rab 1655  df-v 1815  df-dif 2052  df-un 2053  df-in 2054  df-ss 2056  df-nul 2284  df-pw 2406  df-sn 2416  df-pr 2417  df-op 2420  df-uni 2508  df-br 2625  df-opab 2672  df-id 2841  df-xp 3190  df-rel 3191  df-cnv 3192  df-co 3193  df-dm 3194  df-rn 3195  df-res 3196  df-ima 3197  df-fun 3198  df-fn 3199  df-fv 3204  df-top 7594  df-ntr 7661
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