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### Recent Posts

- To Cheer You Up in Difficult Times 31: Federico Ardila’s Four Axioms for Cultivating Diversity
- Dream a Little Dream: Quantum Computer Poetry for the Skeptics (Part I, mainly 2019)
- To Cheer you up in difficult times 30: Irit Dinur, Shai Evra, Ron Livne, Alex Lubotzky, and Shahar Mozes Constructed Locally Testable Codes with Constant Rate, Distance, and Locality
- To cheer you up in difficult times 29: Free will, predictability and quantum computers
- Alef’s corner: Mathematical research
- Let me tell you about three of my recent papers
- Mathematical news to cheer you up
- To Cheer You Up in Difficult Times 28: Math On the Beach (Alef’s Corner)
- To cheer you up in difficult times 27: A major recent “Lean” proof verification

### Top Posts & Pages

- To Cheer You Up in Difficult Times 31: Federico Ardila's Four Axioms for Cultivating Diversity
- The Intermediate Value Theorem Applied to Football
- Extremal Combinatorics III: Some Basic Theorems
- Amazing: Karim Adiprasito proved the g-conjecture for spheres!
- Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
- Updates and plans III.
- An interview with Noga Alon
- TYI 30: Expected number of Dice throws
- The Argument Against Quantum Computers - A Very Short Introduction

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# Tag Archives: Pauline Sarrabezolles

## News on Fractional Helly, Colorful Helly, and Radon

My 1983 Ph D thesis was on Helly-type theorems which is an exciting part of discrete geometry and, in the last two decades, I have had an ongoing research project with Roy Meshulam on topological Helly-type theorems. The subject found … Continue reading