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Theorem frege91d 44941
Description: If 𝐵 follows 𝐴 in 𝑅 then 𝐵 follows 𝐴 in the transitive closure of 𝑅. Similar to Proposition 91 of [Frege1879] p. 68. Comparw with frege91 45144. (Contributed by RP, 15-Jul-2020.)
Hypotheses
Ref Expression
frege91d.r (𝜑 → 𝑅 ∈ V)
frege91d.ac (𝜑 → 𝐴𝑅𝐵)
Assertion
Ref Expression
frege91d (𝜑 → 𝐴(t+‘𝑅)𝐵)

Proof of Theorem frege91d
StepHypRef Expression
1 frege91d.ac . 2 (𝜑 → 𝐴𝑅𝐵)
2 frege91d.r . . . 4 (𝜑 → 𝑅 ∈ V)
3 trclfvlb 15187 . . . 4 (𝑅 ∈ V → 𝑅 ⊆ (t+‘𝑅))
42, 3syl 18 . . 3 (𝜑 → 𝑅 ⊆ (t+‘𝑅))
54ssbrd 5151 . 2 (𝜑 → (𝐴𝑅𝐵 → 𝐴(t+‘𝑅)𝐵))
61, 5mpd 16 1 (𝜑 → 𝐴(t+‘𝑅)𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2147  Vcvv 3454   ⊆ wss 3900   class class class wbr 5106  ‘cfv 6555  t+ctcl 15164
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5252  ax-pow 5331  ax-pr 5395  ax-un 7772
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-int 4911  df-br 5107  df-opab 5171  df-mpt 5190  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-iota 6509  df-fun 6557  df-fv 6563  df-trcl 15166
This theorem is used by:  frege102d  44944  frege129d  44953
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