Theorem ntrss 22958

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 4096	. . . . . . 7 ⊢ (𝑇 ⊆ 𝑆 → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
2	1	adantl 481	. . . . . 6 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇))
3		difss 4089	. . . . . 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 22957	. . . . . 6 ⊢ ((𝐽 ∈ Top ∧ (𝑋 ∖ 𝑇) ⊆ 𝑋 ∧ (𝑋 ∖ 𝑆) ⊆ (𝑋 ∖ 𝑇)) → ((cls‘𝐽)‘(𝑋 ∖ 𝑆)) ⊆ ((cls‘𝐽)‘(𝑋 ∖ 𝑇)))
7	6	3expb 1120	. . . . 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 4099	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑇))) ⊆ (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
10		sstr2 3944	. . . . 5 ⊢ (𝑇 ⊆ 𝑆 → (𝑆 ⊆ 𝑋 → 𝑇 ⊆ 𝑋))
11	10	impcom 407	. . . 4 ⊢ ((𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆) → 𝑇 ⊆ 𝑋)
12	5	ntrval2 22954	. . . 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 22954	. . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
15	14	adantrr 717	. . 3 ⊢ ((𝐽 ∈ Top ∧ (𝑆 ⊆ 𝑋 ∧ 𝑇 ⊆ 𝑆)) → ((int‘𝐽)‘𝑆) = (𝑋 ∖ ((cls‘𝐽)‘(𝑋 ∖ 𝑆))))
16	9, 13, 15	3sstr4d 3993	. 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 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109   ∖ cdif 3902   ⊆ wss 3905  ∪ cuni 4861  ‘cfv 6486  Topctop 22796  intcnt 22920  clsccl 22921

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5221  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7675

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3346  df-rab 3397  df-v 3440  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-pw 4555  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-int 4900  df-iun 4946  df-iin 4947  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-ima 5636  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-top 22797  df-cld 22922  df-ntr 22923  df-cls 22924

This theorem is referenced by:  ntrin  22964  ntrcls0  22979  dvreslem  25826  dvres2lem  25827  dvaddbr  25856  dvmulbr  25857  dvmulbrOLD  25858  dvcnvrelem2  25939  ntruni  36300  cldregopn  36304  limciccioolb  45603  limcicciooub  45619  cncfiooicclem1  45875