SMS scnews item created by Zhou Zhang at Thu 15 Nov 2012 0004
Type: Seminar
Modified: Thu 15 Nov 2012 1333
Distribution: World
Expiry: 6 Dec 2012
Calendar1: 16 Nov 2012 1200-1300
CalLoc1: UNSW Red Centre 4082
Auth: zhangou@124-171-160-64.dyn.iinet.net.au (zhouz) in SMS-WASM

# SYD-UNSW Joint Colloquium: Quas -- Low Complexity Alpern Lemmas: How Can You Tile a Floor With a Mixture of Metric and Imperial Tiles?

Speaker: Prof. Anthony Quas (Victoria)

http://www.math.uvic.ca/faculty/aquas/

Time: Friday, Nov. 16, ***12NOON--1PM***(not the usual time)

Room: RC-4082, Red Centre Building, UNSW

Lunch with speaker: ***after the talk*** (not the usual plan).

For Sydney staff and students, if there are more than one of you commute
together, please feel free to take a taxi. The round trip is covered by
school colloquium fund and you just need to give the receipt to me. I’ll
be back towards the end of this month and you could leave the receipt in
my mail box in 707A (with your name on it).

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Title: Low Complexity Alpern Lemmas: How Can You Tile a Floor With a
Mixture of Metric and Imperial Tiles?

Abstract: in Ergodic Theory, one is often interested in constructing
maps between pairs of systems. A common approach to this is based on
cutting orbits into pieces". These pieces should ideally be simply
described.

I will describe some theorems of this type, indicating how they are
used and talk about recent work with Bryna Kra and Ayse Sahin, where
we study the case of actions of R^d.

Along the way, we discuss the possible tilings of an infinite plane
with 1ft x 1ft tiles; and with 1m x 1m tiles.

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Joint Colloquium web site:

http://www.maths.usyd.edu.au/u/SemConf/JointColloquium/index.html


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