Theorem trclfvcotrg 14962

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 14955	. 2 ⊢ (𝑅 ∈ V → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
2		fvprc 6883	. . 3 ⊢ (¬ 𝑅 ∈ V → (t+‘𝑅) = ∅)
3		0trrel 14927	. . . . 5 ⊢ (∅ ∘ ∅) ⊆ ∅
4	3	a1i 11	. . . 4 ⊢ ((t+‘𝑅) = ∅ → (∅ ∘ ∅) ⊆ ∅)
5		id 22	. . . . 5 ⊢ ((t+‘𝑅) = ∅ → (t+‘𝑅) = ∅)
6	5, 5	coeq12d 5864	. . . 4 ⊢ ((t+‘𝑅) = ∅ → ((t+‘𝑅) ∘ (t+‘𝑅)) = (∅ ∘ ∅))
7	4, 6, 5	3sstr4d 4029	. . 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 1541   ∈ wcel 2106  Vcvv 3474   ⊆ wss 3948  ∅c0 4322   ∘ ccom 5680  ‘cfv 6543  t+ctcl 14931

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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5299  ax-nul 5306  ax-pow 5363  ax-pr 5427  ax-un 7724

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3433  df-v 3476  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-pw 4604  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-int 4951  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5574  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-iota 6495  df-fun 6545  df-fv 6551  df-trcl 14933

This theorem is referenced by:  cotrcltrcl  42466  brtrclfv2  42468  frege96d  42490  frege97d  42493  frege98d  42494  frege109d  42498  frege131d  42505