### Recent Comments

dinostraurio on Seven Problems Around Tverberg… Matthew Cory on The Quantum Computer Puzzle @… Matthew Cory on The Quantum Computer Puzzle @… The Quantum Computer… on A Breakthrough by Maryna Viazo… The Quantum Computer… on Stefan Steinerberger: The Ulam… The Quantum Computer… on Polymath10-post 4: Back to the… Philip Gibbs on Stefan Steinerberger: The Ulam… Philip Gibbs on Stefan Steinerberger: The Ulam… Daniel on Stefan Steinerberger: The Ulam… Philip Gibbs on Stefan Steinerberger: The Ulam… Gil Kalai on Stefan Steinerberger: The Ulam… Gabriel Nivasch on Stefan Steinerberger: The Ulam… -
### Recent Posts

- The Quantum Computer Puzzle @ Notices of the AMS
- Three Conferences: Joel Spencer, April 29-30, Courant; Joel Hass May 20-22, Berkeley, Jean Bourgain May 21-24, IAS, Princeton
- Math and Physics Activities at HUJI
- Stefan Steinerberger: The Ulam Sequence
- TYI 26: Attaining the Maximum
- A Breakthrough by Maryna Viazovska Leading to the Long Awaited Solutions for the Densest Packing Problem in Dimensions 8 and 24
- Polymath10-post 4: Back to the drawing board?
- News (mainly polymath related)
- Polymath 10 Post 3: How are we doing?

### Top Posts & Pages

- A Breakthrough by Maryna Viazovska Leading to the Long Awaited Solutions for the Densest Packing Problem in Dimensions 8 and 24
- Stefan Steinerberger: The Ulam Sequence
- Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
- The Quantum Computer Puzzle @ Notices of the AMS
- Three Conferences: Joel Spencer, April 29-30, Courant; Joel Hass May 20-22, Berkeley, Jean Bourgain May 21-24, IAS, Princeton
- Can Category Theory Serve as the Foundation of Mathematics?
- Greg Kuperberg: It is in NP to Tell if a Knot is Knotted! (under GRH!)
- Seven Problems Around Tverberg's Theorem
- Extremal Combinatorics III: Some Basic Theorems

### RSS

# Tag Archives: Paul Erdos

## Polymath10: The Erdos Rado Delta System Conjecture

The purpose of this post is to start the polymath10 project. It is one of the nine projects (project 3d) proposed by Tim Gowers in his post “possible future polymath projects”. The plan is to attack Erdos-Rado delta system conjecture also known as the … Continue reading

Posted in Combinatorics, Polymath10
Tagged Alexandr Kostochka, Joel Spencer, Paul Erdos, Richard Rado
137 Comments

## EDP Reflections and Celebrations

The Problem In 1932, Erdős conjectured: Erdős Discrepancy Conjecture (EDC) [Problem 9 here] For any constant , there is an such that the following holds. For any function , there exists an and a such that For any , … Continue reading

## Some old and new problems in combinatorics and geometry

Paul Erdős in Jerusalem, 1933 1993 Update: Here is a link to a draft of a paper* based on the first part of this lecture. Some old and new problems in combinatorial geometry I: Around Borsuk’s problem. I just came back from … Continue reading

## Erdős’ Birthday

Paul Erdős was born on March 26, 1913 2013 a hundred years ago. This picture (from Ehud Friedgut’s homepage) was taken in September ’96 in a Chinese restaurant in Warsaw, a few days before Paul Erdős passed away. The other diners are Svante Janson, Tomasz Łuczack and … Continue reading

## Extremal Combinatorics I: Extremal Problems on Set Systems

The “basic notion seminar” is an initiative of David Kazhdan who joined HU math department around 2000. People give series of lectures about basic mathematics (or not so basic at times). Usually, speakers do not talk about their own research and not even … Continue reading