Greedily Partitioning the Natural Numbers into Sets Free of Arithmetic Progressions

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Greedily Partitioning the Natural Numbers into Sets Free of Arithmetic Progressions

We describe a "greedy" algorithm for partitioning the natural numbers into sets free of arithmetic progressions of length 3. A recursive formula governing the resulting partition is proved, and some features of its asymptotic behavior are discussed. Introduction. In 1927, van der Waerden [12] showed that if the set of nonnegative integers is partitioned into a finite number of sets, one of thes...

متن کامل

Independent Arithmetic Progressions in Clique-Free Graphs on the Natural Numbers

We show that if G is a Kr-free graph onN, there are independent sets in G which contain an arbitrarily long arithmetic progression together with its difference. This is a common generalization of theorems of Schur, van der Waerden, and Ramsey. We also discuss various related questions regarding (m, p, c)-sets and parameter words.

متن کامل

Palindromic Numbers in Arithmetic Progressions

Integers have many interesting properties. In this paper it will be shown that, for an arbitrary nonconstant arithmetic progression {an}TM=l of positive integers (denoted by N), either {an}TM=l contains infinitely many palindromic numbers or else 10|aw for every n GN. (This result is a generalization of the theorem concerning the existence of palindromic multiples, cf. [2].) More generally, for...

متن کامل

Product Sets of Arithmetic Progressions

In this paper, we generalize a result of Nathanson and Tenenbaum on sum and product sets, partially answering the problem raised at the end of their paper [N-T]. More precisely, they proved that if A is a large finite set of integers such that |2A| < 3|A| − 4, then |A2| > ( |A| `n |A| ) 2 |A|2−ε. It is shown here that if |2A| < α|A|, for some fixed α < 4, then |A2| |A|2−ε. Furthermore, if α < 3...

متن کامل

Carmichael Numbers in Arithmetic Progressions

We prove that when (a, m) = 1 and a is a quadratic residue mod m, there are infinitely many Carmichael numbers in the arithmetic progression a mod m. Indeed the number of them up to x is at least x1/5 when x is large enough (depending on m). 2010 Mathematics subject classification: primary 11N25; secondary 11A51.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Proceedings of the American Mathematical Society

سال: 1988

ISSN: 0002-9939

DOI: 10.2307/2047261