let p be a prime number
& let a_1 ,a_2 ,a_3 ,...,a_(p ) be integers
show that , there exists an integer k such that the numbers
a_1 +k, a_2 +k,a_3 +k,....,a_p +k
produce at least (1/2)p distinct remainders
when divided by p.
where can I learn about multiple sigma notaions
of dependent and independent variables
something like this
Σ_(1≤i) Σ_(<j) Σ_(<k≤1) (i+j+k)=λ
find λ
I want to know what to study