Theorem ntrss 22114

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 4069	. . . . . . 7 ⊢ (𝑇 ⊆ 𝑆 → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
2	1	adantl 481	. . . . . 6 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
3		difss 4062	. . . . . 6 ⊢ (𝑋 ∖ 𝑇) ⊆ 𝑋
4	2, 3	jctil 519	. . . . 5 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → ((𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇)))
5		clscld.1	. . . . . . 7 ⊢ 𝑋 = ∪ 𝐽
6	5	clsss 22113	. . . . . 6 ⊢ ((𝐽 ∈ Top ∧ (𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇)) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
7	6	3expb 1118	. . . . 5 ⊢ ((𝐽 ∈ Top ∧ ((𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
8	4, 7	sylan2 592	. . . 4 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
9	8	sscond 4072	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))) ⊆ (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
10		sstr2 3924	. . . . 5 ⊢ (𝑇 ⊆ 𝑆 → (𝑆 ⊆ 𝑋 → 𝑇 ⊆ 𝑋))
11	10	impcom 407	. . . 4 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → 𝑇 ⊆ 𝑋)
12	5	ntrval2 22110	. . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝑇 ⊆ 𝑋) → ((int‘𝐽)‘𝑇) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))))
13	11, 12	sylan2 592	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑇) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))))
14	5	ntrval2 22110	. . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
15	14	adantrr 713	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
16	9, 13, 15	3sstr4d 3964	. 2 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑇) ⊆ ((int‘𝐽)‘𝑆))
17	16	3impb 1113	1 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → ((int‘𝐽)‘𝑇) ⊆ ((int‘𝐽)‘𝑆))

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1085   = wceq 1539   ∈ wcel 2108   ∖ cdif 3880   ⊆ wss 3883  ∪ cuni 4836  ‘cfv 6418  Topctop 21950  intcnt 22076  clsccl 22077

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-iin 4924  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-top 21951  df-cld 22078  df-ntr 22079  df-cls 22080

This theorem is referenced by:  ntrin  22120  ntrcls0  22135  dvreslem  24978  dvres2lem  24979  dvaddbr  25007  dvmulbr  25008  dvcnvrelem2  25087  ntruni  34443  cldregopn  34447  limciccioolb  43052  limcicciooub  43068  cncfiooicclem1  43324