**Time: ** Tuesday, Oct 3, 2017, 2:00pm @ MTH1311

**Speaker: ** Chenzhi Zhao (UMD)

**Title: ** Measures with locally finite support and spectrum

**Abstract: ** I'll be talking about measures with discrete support and spectrum. An important question in harmonic analysis is to generalize the Poisson summation formula. To do so, people have been trying to construct non-periodic discrete measures whose Fourier transform is also discrete. This is also related to quasicrystals, a new type of material discovered by Dan Shechtman in 1982 which lead to him winning the Nobel prize in chemistry in 2011. In particular, I'll talk about the examples given by Guinand, Kolountzakis and Meyer.
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