Arithmetic progressions in sets of fractional dimension

نویسندگان

  • Izabella Laba
  • Malabika Pramanik
چکیده

Let E ⊂ R be a closed set of Hausdorff dimension α. We prove that if α is sufficiently close to 1, and if E supports a probability measure obeying appropriate dimensionality and Fourier decay conditions, then E contains non-trivial 3-term arithmetic progressions. Mathematics Subject Classification: 28A78, 42A32, 42A38, 42A45, 11B25.

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On rainbow 4-term arithmetic progressions

{sl Let $[n]={1,dots, n}$ be colored in $k$ colors. A rainbow AP$(k)$ in $[n]$ is a $k$ term arithmetic progression whose elements have different colors. Conlon, Jungi'{c} and Radoiv{c}i'{c} cite{conlon} prove that there exists an equinumerous 4-coloring of $[4n]$ which is rainbow AP(4) free, when $n$ is even. Based on their construction, we show that such a coloring of $[4n]$...

متن کامل

Furstenberg’s proof of long arithmetic progressions: Introduction to Roth’s Theorem

These are the notes for the first of a pair of lectures that will outline a proof given by Hillel Furstenberg [3] for the existence of long arithmetic progressions in sets of integers with positive upper density, a result first proved by Szemerédi [8]. 1 History of long arithmetic progressions The first major result in the theory of long arithmetic progressions was due to van der Waerden in 192...

متن کامل

CS 880 : Advanced Complexity Theory 3 / 31 / 2008 Lecture 24 : Additive Combinatorics

A random A yields A+A of size closer to the high end of |A|2. Furthermore, any set A whose members are sufficiently separated has |A+A| close to this high end, and the high end is actually tight for sets A that are geometric progressions, e.g. the first n powers of two. What about the low end of |A|: what is the structure of sets A where |A+A| is close to |A|? We can see that this low-end estim...

متن کامل

The structure of critical sets for Fp arithmetic progressions

If f were an indicator function for some set S ⊆ Fp, this would give a normalized count of the number of three-term progressions in S. In the present paper we establish a new structure theorem for functions f : Fp → [0, 1] that minimize the number of three-term progressions, subject to a density constraint; and, as a consequence of this result, we prove a further structural result, which can al...

متن کامل

Szemerédi’s Proof of Szemerédi’s Theorem

In 1975, Szemerédi famously established that any set of integers of positive upper density contained arbitrarily long arithmetic progressions. The proof was extremely intricate but elementary, with the main tools needed being the van der Waerden theorem and a lemma now known as the Szemerédi regularity lemma, together with a delicate analysis (based ultimately on double counting arguments) of l...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008