Mathbox for Richard Penner |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > frege108d | Structured version Visualization version GIF version |
Description: If either 𝐴 and 𝐶 are the same or 𝐶 follows 𝐴 in the transitive closure of 𝑅 and 𝐵 is the successor to 𝐶, then either 𝐴 and 𝐵 are the same or 𝐵 follows 𝐴 in the transitive closure of 𝑅. Similar to Proposition 108 of [Frege1879] p. 74. Compare with frege108 37285. (Contributed by RP, 15-Jul-2020.) |
Ref | Expression |
---|---|
frege108d.r | ⊢ (𝜑 → 𝑅 ∈ V) |
frege108d.a | ⊢ (𝜑 → 𝐴 ∈ V) |
frege108d.b | ⊢ (𝜑 → 𝐵 ∈ V) |
frege108d.c | ⊢ (𝜑 → 𝐶 ∈ V) |
frege108d.ac | ⊢ (𝜑 → (𝐴(t+‘𝑅)𝐶 ∨ 𝐴 = 𝐶)) |
frege108d.cb | ⊢ (𝜑 → 𝐶𝑅𝐵) |
Ref | Expression |
---|---|
frege108d | ⊢ (𝜑 → (𝐴(t+‘𝑅)𝐵 ∨ 𝐴 = 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege108d.r | . . 3 ⊢ (𝜑 → 𝑅 ∈ V) | |
2 | frege108d.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ V) | |
3 | frege108d.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ V) | |
4 | frege108d.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ V) | |
5 | frege108d.ac | . . 3 ⊢ (𝜑 → (𝐴(t+‘𝑅)𝐶 ∨ 𝐴 = 𝐶)) | |
6 | frege108d.cb | . . 3 ⊢ (𝜑 → 𝐶𝑅𝐵) | |
7 | 1, 2, 3, 4, 5, 6 | frege102d 37065 | . 2 ⊢ (𝜑 → 𝐴(t+‘𝑅)𝐵) |
8 | 7 | frege106d 37066 | 1 ⊢ (𝜑 → (𝐴(t+‘𝑅)𝐵 ∨ 𝐴 = 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∨ wo 382 = wceq 1475 ∈ wcel 1977 Vcvv 3173 class class class wbr 4583 ‘cfv 5804 t+ctcl 13572 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-int 4411 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-iota 5768 df-fun 5806 df-fv 5812 df-trcl 13574 |
This theorem is referenced by: frege111d 37070 |
Copyright terms: Public domain | W3C validator |