Theorem trclfvcotrg 15055

Description: The value of the transitive closure of a relation is always a transitive relation. (Contributed by RP, 8-May-2020.)

Assertion

Ref	Expression
trclfvcotrg	⊢ ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅)

Proof of Theorem trclfvcotrg

Step	Hyp	Ref	Expression
1		trclfvcotr 15048	. 2 ⊢ (𝑅 ∈ V → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
2		fvprc 6898	. . 3 ⊢ (¬ 𝑅 ∈ V → (t+‘𝑅) = ∅)
3		0trrel 15020	. . . . 5 ⊢ (∅ ∘ ∅) ⊆ ∅
4	3	a1i 11	. . . 4 ⊢ ((t+‘𝑅) = ∅ → (∅ ∘ ∅) ⊆ ∅)
5		id 22	. . . . 5 ⊢ ((t+‘𝑅) = ∅ → (t+‘𝑅) = ∅)
6	5, 5	coeq12d 5875	. . . 4 ⊢ ((t+‘𝑅) = ∅ → ((t+‘𝑅) ∘ (t+‘𝑅)) = (∅ ∘ ∅))
7	4, 6, 5	3sstr4d 4039	. . 3 ⊢ ((t+‘𝑅) = ∅ → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
8	2, 7	syl 17	. 2 ⊢ (¬ 𝑅 ∈ V → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
9	1, 8	pm2.61i 182	1 ⊢ ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅)

Syntax hints:  ¬ wn 3   = wceq 1540   ∈ wcel 2108  Vcvv 3480   ⊆ wss 3951  ∅c0 4333   ∘ ccom 5689  ‘cfv 6561  t+ctcl 15024

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 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5296  ax-nul 5306  ax-pow 5365  ax-pr 5432  ax-un 7755

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-int 4947  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-iota 6514  df-fun 6563  df-fv 6569  df-trcl 15026

This theorem is referenced by:  cotrcltrcl  43738  brtrclfv2  43740  frege96d  43762  frege97d  43765  frege98d  43766  frege109d  43770  frege131d  43777