Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > relexp0 | Structured version Visualization version GIF version |
Description: A relation composed zero times is the (restricted) identity. (Contributed by RP, 22-May-2020.) |
Ref | Expression |
---|---|
relexp0 | ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → (𝑅↑𝑟0) = ( I ↾ ∪ ∪ 𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relexp0g 14778 | . 2 ⊢ (𝑅 ∈ 𝑉 → (𝑅↑𝑟0) = ( I ↾ (dom 𝑅 ∪ ran 𝑅))) | |
2 | relfld 6193 | . . . 4 ⊢ (Rel 𝑅 → ∪ ∪ 𝑅 = (dom 𝑅 ∪ ran 𝑅)) | |
3 | 2 | reseq2d 5903 | . . 3 ⊢ (Rel 𝑅 → ( I ↾ ∪ ∪ 𝑅) = ( I ↾ (dom 𝑅 ∪ ran 𝑅))) |
4 | 3 | eqcomd 2742 | . 2 ⊢ (Rel 𝑅 → ( I ↾ (dom 𝑅 ∪ ran 𝑅)) = ( I ↾ ∪ ∪ 𝑅)) |
5 | 1, 4 | sylan9eq 2796 | 1 ⊢ ((𝑅 ∈ 𝑉 ∧ Rel 𝑅) → (𝑅↑𝑟0) = ( I ↾ ∪ ∪ 𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1539 ∈ wcel 2104 ∪ cun 3890 ∪ cuni 4844 I cid 5499 dom cdm 5600 ran crn 5601 ↾ cres 5602 Rel wrel 5605 (class class class)co 7307 0cc0 10917 ↑𝑟crelexp 14775 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-mulcl 10979 ax-i2m1 10985 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ral 3063 df-rex 3072 df-rab 3287 df-v 3439 df-sbc 3722 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-br 5082 df-opab 5144 df-id 5500 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-iota 6410 df-fun 6460 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-n0 12280 df-relexp 14776 |
This theorem is referenced by: relexp0d 14780 relexpsucl 14787 relexpsucr 14788 relexpindlem 14819 |
Copyright terms: Public domain | W3C validator |