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Mirrors > Home > MPE Home > Th. List > Mathboxes > dfrtrcl4 | Structured version Visualization version GIF version |
Description: Reflexive-transitive closure of a relation, expressed as the union of the zeroth power and the transitive closure. (Contributed by RP, 5-Jun-2020.) |
Ref | Expression |
---|---|
dfrtrcl4 | ⊢ t* = (𝑟 ∈ V ↦ ((𝑟↑𝑟0) ∪ (t+‘𝑟))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfrtrcl3 41714 | . 2 ⊢ t* = (𝑟 ∈ V ↦ ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛)) | |
2 | df-n0 12344 | . . . . . . 7 ⊢ ℕ0 = (ℕ ∪ {0}) | |
3 | 2 | equncomi 4110 | . . . . . 6 ⊢ ℕ0 = ({0} ∪ ℕ) |
4 | iuneq1 4965 | . . . . . 6 ⊢ (ℕ0 = ({0} ∪ ℕ) → ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛) = ∪ 𝑛 ∈ ({0} ∪ ℕ)(𝑟↑𝑟𝑛)) | |
5 | 3, 4 | ax-mp 5 | . . . . 5 ⊢ ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛) = ∪ 𝑛 ∈ ({0} ∪ ℕ)(𝑟↑𝑟𝑛) |
6 | iunxun 5049 | . . . . 5 ⊢ ∪ 𝑛 ∈ ({0} ∪ ℕ)(𝑟↑𝑟𝑛) = (∪ 𝑛 ∈ {0} (𝑟↑𝑟𝑛) ∪ ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛)) | |
7 | 5, 6 | eqtri 2765 | . . . 4 ⊢ ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛) = (∪ 𝑛 ∈ {0} (𝑟↑𝑟𝑛) ∪ ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛)) |
8 | c0ex 11079 | . . . . . . 7 ⊢ 0 ∈ V | |
9 | oveq2 7354 | . . . . . . 7 ⊢ (𝑛 = 0 → (𝑟↑𝑟𝑛) = (𝑟↑𝑟0)) | |
10 | 8, 9 | iunxsn 5046 | . . . . . 6 ⊢ ∪ 𝑛 ∈ {0} (𝑟↑𝑟𝑛) = (𝑟↑𝑟0) |
11 | 10 | a1i 11 | . . . . 5 ⊢ (𝑟 ∈ V → ∪ 𝑛 ∈ {0} (𝑟↑𝑟𝑛) = (𝑟↑𝑟0)) |
12 | oveq1 7353 | . . . . . . . 8 ⊢ (𝑥 = 𝑟 → (𝑥↑𝑟𝑛) = (𝑟↑𝑟𝑛)) | |
13 | 12 | iuneq2d 4978 | . . . . . . 7 ⊢ (𝑥 = 𝑟 → ∪ 𝑛 ∈ ℕ (𝑥↑𝑟𝑛) = ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛)) |
14 | dftrcl3 41701 | . . . . . . 7 ⊢ t+ = (𝑥 ∈ V ↦ ∪ 𝑛 ∈ ℕ (𝑥↑𝑟𝑛)) | |
15 | nnex 12089 | . . . . . . . 8 ⊢ ℕ ∈ V | |
16 | ovex 7379 | . . . . . . . 8 ⊢ (𝑟↑𝑟𝑛) ∈ V | |
17 | 15, 16 | iunex 7888 | . . . . . . 7 ⊢ ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛) ∈ V |
18 | 13, 14, 17 | fvmpt 6940 | . . . . . 6 ⊢ (𝑟 ∈ V → (t+‘𝑟) = ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛)) |
19 | 18 | eqcomd 2743 | . . . . 5 ⊢ (𝑟 ∈ V → ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛) = (t+‘𝑟)) |
20 | 11, 19 | uneq12d 4119 | . . . 4 ⊢ (𝑟 ∈ V → (∪ 𝑛 ∈ {0} (𝑟↑𝑟𝑛) ∪ ∪ 𝑛 ∈ ℕ (𝑟↑𝑟𝑛)) = ((𝑟↑𝑟0) ∪ (t+‘𝑟))) |
21 | 7, 20 | eqtrid 2789 | . . 3 ⊢ (𝑟 ∈ V → ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛) = ((𝑟↑𝑟0) ∪ (t+‘𝑟))) |
22 | 21 | mpteq2ia 5203 | . 2 ⊢ (𝑟 ∈ V ↦ ∪ 𝑛 ∈ ℕ0 (𝑟↑𝑟𝑛)) = (𝑟 ∈ V ↦ ((𝑟↑𝑟0) ∪ (t+‘𝑟))) |
23 | 1, 22 | eqtri 2765 | 1 ⊢ t* = (𝑟 ∈ V ↦ ((𝑟↑𝑟0) ∪ (t+‘𝑟))) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1541 ∈ wcel 2106 Vcvv 3443 ∪ cun 3903 {csn 4581 ∪ ciun 4949 ↦ cmpt 5183 ‘cfv 6488 (class class class)co 7346 0cc0 10981 ℕcn 12083 ℕ0cn0 12343 t+ctcl 14800 t*crtcl 14801 ↑𝑟crelexp 14834 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2708 ax-rep 5237 ax-sep 5251 ax-nul 5258 ax-pow 5315 ax-pr 5379 ax-un 7659 ax-cnex 11037 ax-resscn 11038 ax-1cn 11039 ax-icn 11040 ax-addcl 11041 ax-addrcl 11042 ax-mulcl 11043 ax-mulrcl 11044 ax-mulcom 11045 ax-addass 11046 ax-mulass 11047 ax-distr 11048 ax-i2m1 11049 ax-1ne0 11050 ax-1rid 11051 ax-rnegex 11052 ax-rrecex 11053 ax-cnre 11054 ax-pre-lttri 11055 ax-pre-lttrn 11056 ax-pre-ltadd 11057 ax-pre-mulgt0 11058 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3352 df-rab 3406 df-v 3445 df-sbc 3735 df-csb 3851 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3924 df-nul 4278 df-if 4482 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4861 df-int 4903 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5184 df-tr 5218 df-id 5525 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5582 df-we 5584 df-xp 5633 df-rel 5634 df-cnv 5635 df-co 5636 df-dm 5637 df-rn 5638 df-res 5639 df-ima 5640 df-pred 6246 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6440 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7302 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7790 df-2nd 7909 df-frecs 8176 df-wrecs 8207 df-recs 8281 df-rdg 8320 df-er 8578 df-en 8814 df-dom 8815 df-sdom 8816 df-pnf 11121 df-mnf 11122 df-xr 11123 df-ltxr 11124 df-le 11125 df-sub 11317 df-neg 11318 df-nn 12084 df-2 12146 df-n0 12344 df-z 12430 df-uz 12693 df-seq 13832 df-trcl 14802 df-rtrcl 14803 df-relexp 14835 |
This theorem is referenced by: (None) |
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