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Mirrors > Home > MPE Home > Th. List > Mathboxes > dfttrcl2 | Structured version Visualization version GIF version |
Description: When 𝑅 is a set and a relationship, then its transitive closure can be defined by an intersection. (Contributed by Scott Fenton, 26-Oct-2024.) |
Ref | Expression |
---|---|
dfttrcl2 | ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → t++𝑅 = ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssintab 4893 | . . . 4 ⊢ (t++𝑅 ⊆ ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} ↔ ∀𝑧((𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧) → t++𝑅 ⊆ 𝑧)) | |
2 | ttrclss 33706 | . . . 4 ⊢ ((𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧) → t++𝑅 ⊆ 𝑧) | |
3 | 1, 2 | mpgbir 1803 | . . 3 ⊢ t++𝑅 ⊆ ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} |
4 | 3 | a1i 11 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → t++𝑅 ⊆ ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)}) |
5 | rabab 3450 | . . . 4 ⊢ {𝑧 ∈ V ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} = {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} | |
6 | 5 | inteqi 4880 | . . 3 ⊢ ∩ {𝑧 ∈ V ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} = ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} |
7 | ttrclexg 33709 | . . . 4 ⊢ (𝑅 ∈ 𝑉 → t++𝑅 ∈ V) | |
8 | ssttrcl 33701 | . . . . 5 ⊢ (Rel 𝑅 → 𝑅 ⊆ t++𝑅) | |
9 | ttrcltr 33702 | . . . . 5 ⊢ (t++𝑅 ∘ t++𝑅) ⊆ t++𝑅 | |
10 | 8, 9 | jctir 520 | . . . 4 ⊢ (Rel 𝑅 → (𝑅 ⊆ t++𝑅 ∧ (t++𝑅 ∘ t++𝑅) ⊆ t++𝑅)) |
11 | sseq2 3943 | . . . . . 6 ⊢ (𝑧 = t++𝑅 → (𝑅 ⊆ 𝑧 ↔ 𝑅 ⊆ t++𝑅)) | |
12 | coeq1 5755 | . . . . . . . 8 ⊢ (𝑧 = t++𝑅 → (𝑧 ∘ 𝑧) = (t++𝑅 ∘ 𝑧)) | |
13 | coeq2 5756 | . . . . . . . 8 ⊢ (𝑧 = t++𝑅 → (t++𝑅 ∘ 𝑧) = (t++𝑅 ∘ t++𝑅)) | |
14 | 12, 13 | eqtrd 2778 | . . . . . . 7 ⊢ (𝑧 = t++𝑅 → (𝑧 ∘ 𝑧) = (t++𝑅 ∘ t++𝑅)) |
15 | id 22 | . . . . . . 7 ⊢ (𝑧 = t++𝑅 → 𝑧 = t++𝑅) | |
16 | 14, 15 | sseq12d 3950 | . . . . . 6 ⊢ (𝑧 = t++𝑅 → ((𝑧 ∘ 𝑧) ⊆ 𝑧 ↔ (t++𝑅 ∘ t++𝑅) ⊆ t++𝑅)) |
17 | 11, 16 | anbi12d 630 | . . . . 5 ⊢ (𝑧 = t++𝑅 → ((𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧) ↔ (𝑅 ⊆ t++𝑅 ∧ (t++𝑅 ∘ t++𝑅) ⊆ t++𝑅))) |
18 | 17 | intminss 4902 | . . . 4 ⊢ ((t++𝑅 ∈ V ∧ (𝑅 ⊆ t++𝑅 ∧ (t++𝑅 ∘ t++𝑅) ⊆ t++𝑅)) → ∩ {𝑧 ∈ V ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} ⊆ t++𝑅) |
19 | 7, 10, 18 | syl2an 595 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → ∩ {𝑧 ∈ V ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} ⊆ t++𝑅) |
20 | 6, 19 | eqsstrrid 3966 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)} ⊆ t++𝑅) |
21 | 4, 20 | eqssd 3934 | 1 ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → t++𝑅 = ∩ {𝑧 ∣ (𝑅 ⊆ 𝑧 ∧ (𝑧 ∘ 𝑧) ⊆ 𝑧)}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 {cab 2715 {crab 3067 Vcvv 3422 ⊆ wss 3883 ∩ cint 4876 ∘ ccom 5584 Rel wrel 5585 t++cttrcl 33693 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-ttrcl 33694 |
This theorem is referenced by: (None) |
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