Let be a sequence of integers (not necessarily distinct). Then there exists a subsequence of the sum of whose elements is divisible by .
This is one of the first problems I saw when learning the… 658 more words
Over the past 30-40 years, the so-called polynomial method has developed into a powerful tool in combinatorics and (additive) number theory. There has been a lot of recent interest in it after Dvir’s … 685 more words