Description: Identity law for the shift operation. (Contributed by NM, 19-Aug-2005) (Revised by Mario Carneiro, 5-Nov-2013)
Ref | Expression | ||
---|---|---|---|
Hypothesis | shftfval.1 | |
|
Assertion | shftidt | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | shftfval.1 | |
|
2 | 1 | shftidt2 | |
3 | 2 | fveq1i | |
4 | fvres | |
|
5 | 3 4 | eqtrid | |