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Theorem trclfvlb3 15053
Description: The transitive closure of a relation has a lower bound. (Contributed by RP, 8-May-2020.)
Assertion
Ref Expression
trclfvlb3 (𝑅𝑉 → (𝑅 ∪ (𝑅𝑅)) ⊆ (t+‘𝑅))

Proof of Theorem trclfvlb3
StepHypRef Expression
1 trclfvlb 15050 . 2 (𝑅𝑉𝑅 ⊆ (t+‘𝑅))
2 trclfvlb2 15052 . 2 (𝑅𝑉 → (𝑅𝑅) ⊆ (t+‘𝑅))
31, 2unssd 4145 1 (𝑅𝑉 → (𝑅 ∪ (𝑅𝑅)) ⊆ (t+‘𝑅))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2143  cun 3903  wss 3905  ccom 5665  cfv 6536  t+ctcl 15027
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-pow 5336  ax-pr 5404  ax-un 7732
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-int 4913  df-br 5110  df-opab 5174  df-mpt 5193  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-iota 6492  df-fun 6538  df-fv 6544  df-trcl 15029
This theorem is used by: (None)
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