Description: The last symbol of a word cyclically shifted by N positions is the symbol at index (N-1) of the original word. (Contributed by AV, 21-Mar-2018) (Revised by AV, 5-Jun-2018) (Revised by AV, 1-Nov-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | lswcshw | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ovex | |
|
2 | lsw | |
|
3 | 1 2 | mp1i | |
4 | elfzelz | |
|
5 | cshwlen | |
|
6 | 4 5 | sylan2 | |
7 | 6 | fvoveq1d | |
8 | cshwidxn | |
|
9 | 3 7 8 | 3eqtrd | |