Description: The second Chebyshev function does not change off the integers. (Contributed by Mario Carneiro, 9-Apr-2016)
Ref | Expression | ||
---|---|---|---|
Assertion | chpfl | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | flidm | |
|
2 | 1 | oveq2d | |
3 | 2 | sumeq1d | |
4 | reflcl | |
|
5 | chpval | |
|
6 | 4 5 | syl | |
7 | chpval | |
|
8 | 3 6 7 | 3eqtr4d | |