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Mirrors > Home > MPE Home > Th. List > Mathboxes > frege98 | Structured version Visualization version GIF version |
Description: If 𝑌 follows 𝑋 and 𝑍 follows 𝑌 in the 𝑅-sequence then 𝑍 follows 𝑋 in the 𝑅-sequence because the transitive closure of a relation has the transitive property. Proposition 98 of [Frege1879] p. 71. (Contributed by RP, 2-Jul-2020.) (Revised by RP, 6-Jul-2020.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
frege98.x | ⊢ 𝑋 ∈ 𝐴 |
frege98.y | ⊢ 𝑌 ∈ 𝐵 |
frege98.z | ⊢ 𝑍 ∈ 𝐶 |
frege98.r | ⊢ 𝑅 ∈ 𝐷 |
Ref | Expression |
---|---|
frege98 | ⊢ (𝑋(t+‘𝑅)𝑌 → (𝑌(t+‘𝑅)𝑍 → 𝑋(t+‘𝑅)𝑍)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege98.x | . . . 4 ⊢ 𝑋 ∈ 𝐴 | |
2 | frege98.r | . . . 4 ⊢ 𝑅 ∈ 𝐷 | |
3 | 1, 2 | frege97 43269 | . . 3 ⊢ 𝑅 hereditary ((t+‘𝑅) “ {𝑋}) |
4 | frege98.y | . . . 4 ⊢ 𝑌 ∈ 𝐵 | |
5 | frege98.z | . . . 4 ⊢ 𝑍 ∈ 𝐶 | |
6 | fvex 6897 | . . . . 5 ⊢ (t+‘𝑅) ∈ V | |
7 | imaexg 7902 | . . . . 5 ⊢ ((t+‘𝑅) ∈ V → ((t+‘𝑅) “ {𝑋}) ∈ V) | |
8 | 6, 7 | ax-mp 5 | . . . 4 ⊢ ((t+‘𝑅) “ {𝑋}) ∈ V |
9 | 4, 5, 2, 8 | frege84 43256 | . . 3 ⊢ (𝑅 hereditary ((t+‘𝑅) “ {𝑋}) → (𝑌 ∈ ((t+‘𝑅) “ {𝑋}) → (𝑌(t+‘𝑅)𝑍 → 𝑍 ∈ ((t+‘𝑅) “ {𝑋})))) |
10 | 3, 9 | ax-mp 5 | . 2 ⊢ (𝑌 ∈ ((t+‘𝑅) “ {𝑋}) → (𝑌(t+‘𝑅)𝑍 → 𝑍 ∈ ((t+‘𝑅) “ {𝑋}))) |
11 | 1 | elexi 3488 | . . . 4 ⊢ 𝑋 ∈ V |
12 | 4 | elexi 3488 | . . . 4 ⊢ 𝑌 ∈ V |
13 | 11, 12 | elimasn 6081 | . . 3 ⊢ (𝑌 ∈ ((t+‘𝑅) “ {𝑋}) ↔ ⟨𝑋, 𝑌⟩ ∈ (t+‘𝑅)) |
14 | df-br 5142 | . . 3 ⊢ (𝑋(t+‘𝑅)𝑌 ↔ ⟨𝑋, 𝑌⟩ ∈ (t+‘𝑅)) | |
15 | 13, 14 | bitr4i 278 | . 2 ⊢ (𝑌 ∈ ((t+‘𝑅) “ {𝑋}) ↔ 𝑋(t+‘𝑅)𝑌) |
16 | 5 | elexi 3488 | . . . . 5 ⊢ 𝑍 ∈ V |
17 | 11, 16 | elimasn 6081 | . . . 4 ⊢ (𝑍 ∈ ((t+‘𝑅) “ {𝑋}) ↔ ⟨𝑋, 𝑍⟩ ∈ (t+‘𝑅)) |
18 | df-br 5142 | . . . 4 ⊢ (𝑋(t+‘𝑅)𝑍 ↔ ⟨𝑋, 𝑍⟩ ∈ (t+‘𝑅)) | |
19 | 17, 18 | bitr4i 278 | . . 3 ⊢ (𝑍 ∈ ((t+‘𝑅) “ {𝑋}) ↔ 𝑋(t+‘𝑅)𝑍) |
20 | 19 | imbi2i 336 | . 2 ⊢ ((𝑌(t+‘𝑅)𝑍 → 𝑍 ∈ ((t+‘𝑅) “ {𝑋})) ↔ (𝑌(t+‘𝑅)𝑍 → 𝑋(t+‘𝑅)𝑍)) |
21 | 10, 15, 20 | 3imtr3i 291 | 1 ⊢ (𝑋(t+‘𝑅)𝑌 → (𝑌(t+‘𝑅)𝑍 → 𝑋(t+‘𝑅)𝑍)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2098 Vcvv 3468 {csn 4623 ⟨cop 4629 class class class wbr 5141 “ cima 5672 ‘cfv 6536 t+ctcl 14935 hereditary whe 43081 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-frege1 43099 ax-frege2 43100 ax-frege8 43118 ax-frege52a 43166 ax-frege58b 43210 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-ifp 1060 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7852 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-nn 12214 df-2 12276 df-n0 12474 df-z 12560 df-uz 12824 df-seq 13970 df-trcl 14937 df-relexp 14970 df-he 43082 |
This theorem is referenced by: (None) |
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