Theorem kur14lem3 33070

Description: Lemma for kur14 33078. A closure is a subset of the base set. (Contributed by Mario Carneiro, 11-Feb-2015.)

Hypotheses

Ref	Expression
kur14lem.j	⊢ 𝐽 ∈ Top
kur14lem.x	⊢ 𝑋 = ∪ 𝐽
kur14lem.k	⊢ 𝐾 = (cls‘𝐽)
kur14lem.i	⊢ 𝐼 = (int‘𝐽)
kur14lem.a	⊢ 𝐴 ⊆ 𝑋

Assertion

Ref	Expression
kur14lem3	⊢ (𝐾‘𝐴) ⊆ 𝑋

Proof of Theorem kur14lem3

Step	Hyp	Ref	Expression
1		kur14lem.k	. . 3 ⊢ 𝐾 = (cls‘𝐽)
2	1	fveq1i 6757	. 2 ⊢ (𝐾‘𝐴) = ((cls‘𝐽)‘𝐴)
3		kur14lem.j	. . 3 ⊢ 𝐽 ∈ Top
4		kur14lem.a	. . 3 ⊢ 𝐴 ⊆ 𝑋
5		kur14lem.x	. . . 4 ⊢ 𝑋 = ∪ 𝐽
6	5	clsss3 22118	. . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ⊆ 𝑋) → ((cls‘𝐽)‘𝐴) ⊆ 𝑋)
7	3, 4, 6	mp2an 688	. 2 ⊢ ((cls‘𝐽)‘𝐴) ⊆ 𝑋
8	2, 7	eqsstri 3951	1 ⊢ (𝐾‘𝐴) ⊆ 𝑋

Syntax hints:   = wceq 1539   ∈ wcel 2108   ⊆ 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-cls 22080

This theorem is referenced by:  kur14lem6  33073  kur14lem7  33074