**UPDATE:** Schedule change! An additional workshop On February 5 and shift in dats of the others. Here is the calendar

We have now at HUJI a semester break, but the special semester in High dimensional combinatorics and IIAS leaded by Tali Kaufman and Alex Lubotzky is extremely active.

The Monday program continues during the semester break (Jan 26 to March 18) in the form of “special days”, each devoted to a certain topic. (On a very basic level.)

The first special day, this Monday, January 29, is organized by Anna Gundert and Uli Wagner.

The topic is pseudo-randomness. On January 30 there is an Action now day (less basic); on February 05: Stability and property testing February 12: High dimensional Ranom walks day; On February 19: Error correcting codes and high dimensional expanders; on.

I will update about the later special days later.

### On Monday, February 12, we will have a special day on “High Dimensional Random Walks” organized by **Ron Rosenthal**.

**Dudi Mass – Random walks by decreasing differences method**

11:30-12:30 **Ron Rosenthal **– Random walks on oriented cells – part I

13:45- 14:45 **Izhar O**ppenheim – Decomposition Theorem for high dimensional random walks

15:00-16:00 **Amitay Kamber – Cutoff of random walks on hyperbolic surfaces and Ramanujan complexes**

16:30-17:30

**Ron Rosenthal –**Random walks on oriented cells – part II

### On Monday, February 5, we will have a special day on “Stability and property testing”

### organized by Oren Becker.

Our calendar:

Place: Room 130, IIAS, Feldman Building, Givat Ram

Program:

10:00-11:00 Oren Becker – The basics of stability and group theoretic prerequisites

11:15-12:15 Tamar Ziegler – Polynomial testing on uniform sets

13:45-14:45 Oren Becker – Proving stability: qualitatively and quantitatively

15:00-16:00 Lev Glebsky – Ultraproducts and stability

______

Old post.

Place: Room 130, IIAS, Feldman Building, Givat Ram

## January 29

**PROGRAMM**

### 10:00-11:00 Anna Gundert / Uli Wagner – Quasirandomness and expansion for graphs

### 11:30-12:30 Anna Gundert / Uli Wagner – Quasirandomness for hypergraphs

### 13:45- 14:45 Uli Wagner – Szemeredi’s regularity lemma for dense graphs

### 15:00-16:00 Tamar Ziegler – Gowers uniformity norms

### 16:30-17:30 Anna Gundert / Uli Wagner – Hypergraph regularity

## January 30

## February 5 and 12

I will add the programs once they will be available.

## February 19 and March 5

I will add the programs once they will be available.

On Monday, February 12, we will have a special day on “High Dimensional Random Walks” organized by Ron Rosenthal.