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BEGIN:VEVENT
SUMMARY:Shrikrishna G. Dani (DAE-UM CBS)
DTSTART:20201222T103000Z
DTEND:20201222T114500Z
DTSTAMP:20260404T131154Z
UID:GSWebinars/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GSWeb
 inars/1/">Trigonometry in ancient India</a>\nby Shrikrishna G. Dani (DAE-U
 M CBS) as part of Gonit Sora Webinars for Students\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/GSWebinars/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rukmini Dey (International Centre for Theoretical Sciences\, Benga
 luru)
DTSTART:20210313T102500Z
DTEND:20210313T114500Z
DTSTAMP:20260404T131154Z
UID:GSWebinars/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GSWeb
 inars/2/">Introduction to minimal surfaces</a>\nby Rukmini Dey (Internatio
 nal Centre for Theoretical Sciences\, Bengaluru) as part of Gonit Sora Web
 inars for Students\n\n\nAbstract\nI will review some differential geometry
  of surfaces. Next I will introduce minimal surfaces and derive their Weir
 strass Enneper representation. I will also mention interesting connections
  between certain Euler-Ramanujan identities and minimal surfaces.\n\nMore 
 details: https://gonitsora.com/webinar-dey/\n
LOCATION:https://stable.researchseminars.org/talk/GSWebinars/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:M. Vidyasagar FRS (Indian Institute of Technology Hyderabad)
DTSTART:20210320T053000Z
DTEND:20210320T064500Z
DTSTAMP:20260404T131155Z
UID:GSWebinars/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GSWeb
 inars/3/">Ramanujan Graphs and the Matrix Completion Problem</a>\nby M. Vi
 dyasagar FRS (Indian Institute of Technology Hyderabad) as part of Gonit S
 ora Webinars for Students\n\n\nAbstract\nGraphs consist of vertices\, and 
 edges between vertices. A graph is said to be d-regular if every vertex ha
 s degree d\, that is\, exactly d other vertices connected to it. For each 
 graph one can associate an Adjacency matrix A\, of size n by n where n is 
 the number of vertices. If the graph is d-regular\, then d is always an ei
 genvalue of A. Such a graph is called a "Ramanujan graph" if the second la
 rgest eigenvalue of A is no larger than twice the square root of d-1. In t
 his talk I will explain where this rather strange-looking bound comes from
 \, and show that in fact it is the best one can achieve in any graph as n 
 becomes large. Explicit constructions of Ramanujan graphs are still very f
 ew\, and I will provide a couple of such procedures. Finally\, I will disc
 uss the "matrix completion problem" which has applications in many enginee
 ring domains\, and show how it can be solved using Ramanujan graphs.\n
LOCATION:https://stable.researchseminars.org/talk/GSWebinars/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ken Ono (University of Virginia)
DTSTART:20210421T120000Z
DTEND:20210421T131500Z
DTSTAMP:20260404T131155Z
UID:GSWebinars/4
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GSWeb
 inars/4/">What is the Riemann Hypothesis\, and why does it matter?</a>\nby
  Ken Ono (University of Virginia) as part of Gonit Sora Webinars for Stude
 nts\n\n\nAbstract\nThe Riemann hypothesis provides insights into the distr
 ibution of prime numbers\, stating that the nontrivial zeros of the Rieman
 n zeta function have a “real part” of one-half. A proof of the hypothe
 sis would be world news and fetch a $1 million Millennium Prize. In this l
 ecture\, Ken  Ono will discuss the mathematical meaning of the Riemann h
 ypothesis and why it matters. Along the way\, he will tell tales of myster
 ies about prime numbers and highlight new advances. He will conclude with 
 a discussion of recent joint work with mathematicians Michael Griffin of B
 righam Young University\, Larry Rolen of Vanderbilt\, and Don Zagier of th
 e Max Planck Institute\, which sheds new light on this famous problem.\n
LOCATION:https://stable.researchseminars.org/talk/GSWebinars/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fernando Rodriguez Villegas (The Abdus Salam International Centre 
 for Theoretical Physics)
DTSTART:20210508T080000Z
DTEND:20210508T091500Z
DTSTAMP:20260404T131155Z
UID:GSWebinars/5
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GSWeb
 inars/5/">Mathematics of the football</a>\nby Fernando Rodriguez Villegas 
 (The Abdus Salam International Centre for Theoretical Physics) as part of 
 Gonit Sora Webinars for Students\n\n\nAbstract\nHow to build something sph
 erical out of pieces all of roughly the same shape? This problem concerns 
 the structure of balls for many games\, special molecules\, domes  and vir
 uses. In this talk we will discuss some of the geometry that these structu
 res share and how the constraints imposed by physical space lead to simila
 r solutions.\n
LOCATION:https://stable.researchseminars.org/talk/GSWebinars/5/
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