Theorem trclfvcotrg 15052

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 15045	. 2 ⊢ (𝑅 ∈ V → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
2		fvprc 6899	. . 3 ⊢ (¬ 𝑅 ∈ V → (t+‘𝑅) = ∅)
3		0trrel 15017	. . . . 5 ⊢ (∅ ∘ ∅) ⊆ ∅
4	3	a1i 11	. . . 4 ⊢ ((t+‘𝑅) = ∅ → (∅ ∘ ∅) ⊆ ∅)
5		id 22	. . . . 5 ⊢ ((t+‘𝑅) = ∅ → (t+‘𝑅) = ∅)
6	5, 5	coeq12d 5878	. . . 4 ⊢ ((t+‘𝑅) = ∅ → ((t+‘𝑅) ∘ (t+‘𝑅)) = (∅ ∘ ∅))
7	4, 6, 5	3sstr4d 4043	. . 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 1537   ∈ wcel 2106  Vcvv 3478   ⊆ wss 3963  ∅c0 4339   ∘ ccom 5693  ‘cfv 6563  t+ctcl 15021

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pow 5371  ax-pr 5438  ax-un 7754

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-int 4952  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-res 5701  df-iota 6516  df-fun 6565  df-fv 6571  df-trcl 15023

This theorem is referenced by:  cotrcltrcl  43715  brtrclfv2  43717  frege96d  43739  frege97d  43742  frege98d  43743  frege109d  43747  frege131d  43754