Theorem tcel 9664

Description: The transitive closure function converts the element relation to the subset relation. (Contributed by Mario Carneiro, 23-Jun-2013.)

Hypothesis

Ref	Expression
tc2.1	⊢ 𝐴 ∈ V

Assertion

Ref	Expression
tcel	⊢ (𝐵 ∈ 𝐴 → (TC‘𝐵) ⊆ (TC‘𝐴))

Proof of Theorem tcel

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		tcvalg 9657	. 2 ⊢ (𝐵 ∈ 𝐴 → (TC‘𝐵) = ∩ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)})
2		ssel 3929	. . . . . . . 8 ⊢ (𝐴 ⊆ 𝑥 → (𝐵 ∈ 𝐴 → 𝐵 ∈ 𝑥))
3		trss 5217	. . . . . . . . 9 ⊢ (Tr 𝑥 → (𝐵 ∈ 𝑥 → 𝐵 ⊆ 𝑥))
4	3	com12 32	. . . . . . . 8 ⊢ (𝐵 ∈ 𝑥 → (Tr 𝑥 → 𝐵 ⊆ 𝑥))
5	2, 4	syl6com 37	. . . . . . 7 ⊢ (𝐵 ∈ 𝐴 → (𝐴 ⊆ 𝑥 → (Tr 𝑥 → 𝐵 ⊆ 𝑥)))
6	5	impd 410	. . . . . 6 ⊢ (𝐵 ∈ 𝐴 → ((𝐴 ⊆ 𝑥 ∧ Tr 𝑥) → 𝐵 ⊆ 𝑥))
7		simpr 484	. . . . . 6 ⊢ ((𝐴 ⊆ 𝑥 ∧ Tr 𝑥) → Tr 𝑥)
8	6, 7	jca2 513	. . . . 5 ⊢ (𝐵 ∈ 𝐴 → ((𝐴 ⊆ 𝑥 ∧ Tr 𝑥) → (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)))
9	8	ss2abdv 4019	. . . 4 ⊢ (𝐵 ∈ 𝐴 → {𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)} ⊆ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)})
10		intss 4926	. . . 4 ⊢ ({𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)} ⊆ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)} → ∩ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)} ⊆ ∩ {𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)})
11	9, 10	syl 17	. . 3 ⊢ (𝐵 ∈ 𝐴 → ∩ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)} ⊆ ∩ {𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)})
12		tc2.1	. . . 4 ⊢ 𝐴 ∈ V
13		tcvalg 9657	. . . 4 ⊢ (𝐴 ∈ V → (TC‘𝐴) = ∩ {𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)})
14	12, 13	ax-mp 5	. . 3 ⊢ (TC‘𝐴) = ∩ {𝑥 ∣ (𝐴 ⊆ 𝑥 ∧ Tr 𝑥)}
15	11, 14	sseqtrrdi 3977	. 2 ⊢ (𝐵 ∈ 𝐴 → ∩ {𝑥 ∣ (𝐵 ⊆ 𝑥 ∧ Tr 𝑥)} ⊆ (TC‘𝐴))
16	1, 15	eqsstrd 3970	1 ⊢ (𝐵 ∈ 𝐴 → (TC‘𝐵) ⊆ (TC‘𝐴))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1542   ∈ wcel 2114  {cab 2715  Vcvv 3442   ⊆ wss 3903  ∩ cint 4904  Tr wtr 5207  ‘cfv 6500  TCctc 9655

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5226  ax-sep 5243  ax-nul 5253  ax-pr 5379  ax-un 7690  ax-inf2 9562

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-int 4905  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5527  df-eprel 5532  df-po 5540  df-so 5541  df-fr 5585  df-we 5587  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-pred 6267  df-ord 6328  df-on 6329  df-lim 6330  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-ov 7371  df-om 7819  df-2nd 7944  df-frecs 8233  df-wrecs 8264  df-recs 8313  df-rdg 8351  df-tc 9656

This theorem is referenced by:  tcrank  9808  hsmexlem4  10351