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Mirrors > Home > MPE Home > Th. List > Mathboxes > frege98d | Structured version Visualization version GIF version |
Description: If 𝐶 follows 𝐴 and 𝐵 follows 𝐶 in the transitive closure of 𝑅, then 𝐵 follows 𝐴 in the transitive closure of 𝑅. Similar to Proposition 98 of [Frege1879] p. 71. Compare with frege98 40185. (Contributed by RP, 15-Jul-2020.) |
Ref | Expression |
---|---|
frege98d.a | ⊢ (𝜑 → 𝐴 ∈ V) |
frege98d.b | ⊢ (𝜑 → 𝐵 ∈ V) |
frege98d.c | ⊢ (𝜑 → 𝐶 ∈ V) |
frege98d.ac | ⊢ (𝜑 → 𝐴(t+‘𝑅)𝐶) |
frege98d.cb | ⊢ (𝜑 → 𝐶(t+‘𝑅)𝐵) |
Ref | Expression |
---|---|
frege98d | ⊢ (𝜑 → 𝐴(t+‘𝑅)𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege98d.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) | |
2 | frege98d.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ V) | |
3 | frege98d.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ V) | |
4 | frege98d.ac | . . 3 ⊢ (𝜑 → 𝐴(t+‘𝑅)𝐶) | |
5 | frege98d.cb | . . 3 ⊢ (𝜑 → 𝐶(t+‘𝑅)𝐵) | |
6 | brcogw 5732 | . . 3 ⊢ (((𝐴 ∈ V ∧ 𝐵 ∈ V ∧ 𝐶 ∈ V) ∧ (𝐴(t+‘𝑅)𝐶 ∧ 𝐶(t+‘𝑅)𝐵)) → 𝐴((t+‘𝑅) ∘ (t+‘𝑅))𝐵) | |
7 | 1, 2, 3, 4, 5, 6 | syl32anc 1370 | . 2 ⊢ (𝜑 → 𝐴((t+‘𝑅) ∘ (t+‘𝑅))𝐵) |
8 | trclfvcotrg 14364 | . . . 4 ⊢ ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅) | |
9 | 8 | a1i 11 | . . 3 ⊢ (𝜑 → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅)) |
10 | 9 | ssbrd 5100 | . 2 ⊢ (𝜑 → (𝐴((t+‘𝑅) ∘ (t+‘𝑅))𝐵 → 𝐴(t+‘𝑅)𝐵)) |
11 | 7, 10 | mpd 15 | 1 ⊢ (𝜑 → 𝐴(t+‘𝑅)𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2105 Vcvv 3492 ⊆ wss 3933 class class class wbr 5057 ∘ ccom 5552 ‘cfv 6348 t+ctcl 14333 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-ral 3140 df-rex 3141 df-rab 3144 df-v 3494 df-sbc 3770 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4831 df-int 4868 df-br 5058 df-opab 5120 df-mpt 5138 df-id 5453 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-iota 6307 df-fun 6350 df-fv 6356 df-trcl 14335 |
This theorem is referenced by: (None) |
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