BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
PRODID:-//Missouri State University/Calendar of Events//EN
CALSCALE:GREGORIAN
X-WR-TIMEZONE:America/Chicago
BEGIN:VTIMEZONE
TZID:America/Chicago
BEGIN:DAYLIGHT
TZOFFSETFROM:-0600
TZOFFSETTO:-0500
DTSTART:20070311T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
TZNAME:CDT
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0500
TZOFFSETTO:-0600
DTSTART:20071104T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
TZNAME:CST
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:5fffee65-8783-4076-b767-1e44fe90dcfb.211077@calendar.missouristate.edu
CREATED:20201102T150737Z
LAST-MODIFIED:20201102T150737Z
LOCATION:
SUMMARY:Mathematics Colloquium via Zoom
DESCRIPTION:Exponential Riesz bases in finite abelian groups and tightness
  quantities\n\n\nDr. Azita Mayeli\n\n\nCity University of New York\n\n\nA
 bstract\n\n\nMotivated by the open problem of existing a subset of $\\Bbb
  R^d$ which do not admit any exponential Riesz basis\, we focus on expone
 ntial Riesz bases in finite abelian groups. We show that every subset of 
 a finite abelian group has such a basis\, therefore removing the interest
  in the existence question in this context. We then introduce tightness q
 uantities for subsets to measure the conditioning of Riesz bases. As a re
 sult\, we obtain a new weak evidence in the favor of the open problem in 
 the Euclidean space by presenting a sequence of subsets of $\\Bbb Z_m^d$ 
 whose tightness quantities go to infinity as $m$ goes to $\\infty$. This 
 talk is based on a joint work with Sam Ferguson and Nat Sothanaphan.\n\n\
 n \n\n\nZoom Meeting ID: 999 1481 2830\n\n\nPasscode upon request.
X-ALT-DESC;FMTTYPE=text/html:&lt;html&gt;&lt;head&gt;&lt;title&gt;&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;p&gt;&lt;s
 trong&gt;Exponential Riesz bases in finite abelian groups and tightness quan
 tities&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&lt;strong&gt;Dr. Azita Mayeli&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&lt;strong
 &gt;City University of New York&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&lt;em&gt;Abstract&lt;/em&gt;&lt;/p&gt;\n&lt;p&gt;&lt;
 span&gt;Motivated by the open problem of existing a subset of $\\Bbb R^d$ wh
 ich do not admit any exponential Riesz basis\, we focus on exponential Ri
 esz bases in finite abelian groups. We show that every subset of a finite
  abelian group has such a basis\, therefore removing the interest in the 
 existence question in this context. We then introduce tightness quantitie
 s for subsets to measure the conditioning of Riesz bases. As a result\, w
 e obtain a new weak evidence in the favor of the open problem in the Eucl
 idean space by presenting a sequence of subsets of $\\Bbb Z_m^d$ whose ti
 ghtness quantities go to infinity as $m$ goes to $\\infty$. This talk is 
 based on a joint work with Sam Ferguson and Nat Sothanaphan.&lt;/span&gt;&lt;/p&gt;\n
 &lt;p&gt;&amp;nbsp\;&lt;/p&gt;\n&lt;p&gt;Zoom Meeting ID:&amp;nbsp\;999 1481 2830&lt;/p&gt;\n&lt;p&gt;Passcode 
 upon request.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;
DTSTART;TZID=America/Chicago:20201117T150000
DTEND;TZID=America/Chicago:20201117T160000
SEQUENCE:0
URL:
CATEGORIES:Public,Alumni,Current Students,Faculty,Staff
END:VEVENT
END:VCALENDAR