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- The Interplay Between Matrices and Sets that Tile by Translations — Department of Mathematics and Computer Science

128 Add event to calendar vCal iCal Abstract A set K tiles Rn by translations if K k k in Zn is a partition of Rn I will discuss the interplay between these sets and n by n matrices In particular I will discuss the following three questions 1 For which matrices A do there exist sets K that tile by translation and such that K is a subset of A K 2 For which matrices A do there exist sets K that tile by translation such that the closure of K is contained in A K 3 For which matrices A do there exist sets K that tile by translation and Aj K j in Z is a partition of Rn Many examples will be given of sets as in 1 2 3 above satisfying additional symmetry convexity conditions Any proofs given will be restricted to the 1 or 2 dimensional case Open problems will also be given Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Original URL path: http://mathcs.slu.edu/events/imported/F01-09-27-01-Top (2016-02-12)

Open archived version from archive - Betti Numbers of Coverings — Department of Mathematics and Computer Science

10 PM to 03 00 PM Where RH 128 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar Tue Feb 16

Original URL path: http://mathcs.slu.edu/events/imported/F01-09-20-01-Top (2016-02-12)

Open archived version from archive - Flat Lorentz 3-Manifolds and Hyperbolic Geometry — Department of Mathematics and Computer Science

04 2001 from 02 10 PM to 03 00 PM Where RH 211 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology

Original URL path: http://mathcs.slu.edu/events/imported/S01-05-04-01-Top (2016-02-12)

Open archived version from archive