Theorem ntrss 22206

Description: Subset relationship for interior. (Contributed by NM, 3-Oct-2007.)

Hypothesis

Ref	Expression
clscld.1	⊢ 𝑋 = ∪ 𝐽

Assertion

Ref	Expression
ntrss	⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → ((int‘𝐽)‘𝑇) ⊆ ((int‘𝐽)‘𝑆))

Proof of Theorem ntrss

Step	Hyp	Ref	Expression
1		sscon 4073	. . . . . . 7 ⊢ (𝑇 ⊆ 𝑆 → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
2	1	adantl 482	. . . . . 6 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
3		difss 4066	. . . . . 6 ⊢ (𝑋 ∖ 𝑇) ⊆ 𝑋
4	2, 3	jctil 520	. . . . 5 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → ((𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇)))
5		clscld.1	. . . . . . 7 ⊢ 𝑋 = ∪ 𝐽
6	5	clsss 22205	. . . . . 6 ⊢ ((𝐽 ∈ Top ∧ (𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇)) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
7	6	3expb 1119	. . . . 5 ⊢ ((𝐽 ∈ Top ∧ ((𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
8	4, 7	sylan2 593	. . . 4 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
9	8	sscond 4076	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))) ⊆ (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
10		sstr2 3928	. . . . 5 ⊢ (𝑇 ⊆ 𝑆 → (𝑆 ⊆ 𝑋 → 𝑇 ⊆ 𝑋))
11	10	impcom 408	. . . 4 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → 𝑇 ⊆ 𝑋)
12	5	ntrval2 22202	. . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝑇 ⊆ 𝑋) → ((int‘𝐽)‘𝑇) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))))
13	11, 12	sylan2 593	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑇) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))))
14	5	ntrval2 22202	. . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
15	14	adantrr 714	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
16	9, 13, 15	3sstr4d 3968	. 2 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑇) ⊆ ((int‘𝐽)‘𝑆))
17	16	3impb 1114	1 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → ((int‘𝐽)‘𝑇) ⊆ ((int‘𝐽)‘𝑆))

Syntax hints:   → wi 4   ∧ wa 396   ∧ w3a 1086   = wceq 1539   ∈ wcel 2106   ∖ cdif 3884   ⊆ wss 3887  ∪ cuni 4839  ‘cfv 6433  Topctop 22042  intcnt 22168  clsccl 22169

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-iin 4927  df-br 5075  df-opab 5137  df-mpt 5158  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-top 22043  df-cld 22170  df-ntr 22171  df-cls 22172

This theorem is referenced by:  ntrin  22212  ntrcls0  22227  dvreslem  25073  dvres2lem  25074  dvaddbr  25102  dvmulbr  25103  dvcnvrelem2  25182  ntruni  34516  cldregopn  34520  limciccioolb  43162  limcicciooub  43178  cncfiooicclem1  43434