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BEGIN:VEVENT
SUMMARY:Shrikrishna G. Dani (DAE-UM CBS)
DTSTART:20201222T103000Z
DTEND:20201222T114500Z
DTSTAMP:20260422T225753Z
UID:GSWebinars/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GSWebinars/1
 /">Trigonometry in ancient India</a>\nby Shrikrishna G. Dani (DAE-UM CBS) 
 as part of Gonit Sora Webinars for Students\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/GSWebinars/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rukmini Dey (International Centre for Theoretical Sciences\, Benga
 luru)
DTSTART:20210313T102500Z
DTEND:20210313T114500Z
DTSTAMP:20260422T225753Z
UID:GSWebinars/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GSWebinars/2
 /">Introduction to minimal surfaces</a>\nby Rukmini Dey (International Cen
 tre for Theoretical Sciences\, Bengaluru) as part of Gonit Sora Webinars f
 or Students\n\n\nAbstract\nI will review some differential geometry of sur
 faces. Next I will introduce minimal surfaces and derive their Weirstrass 
 Enneper representation. I will also mention interesting connections betwee
 n certain Euler-Ramanujan identities and minimal surfaces.\n\nMore details
 : https://gonitsora.com/webinar-dey/\n
LOCATION:https://researchseminars.org/talk/GSWebinars/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:M. Vidyasagar FRS (Indian Institute of Technology Hyderabad)
DTSTART:20210320T053000Z
DTEND:20210320T064500Z
DTSTAMP:20260422T225753Z
UID:GSWebinars/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GSWebinars/3
 /">Ramanujan Graphs and the Matrix Completion Problem</a>\nby M. Vidyasaga
 r FRS (Indian Institute of Technology Hyderabad) as part of Gonit Sora Web
 inars for Students\n\n\nAbstract\nGraphs consist of vertices\, and edges b
 etween vertices. A graph is said to be d-regular if every vertex has degre
 e d\, that is\, exactly d other vertices connected to it. For each graph o
 ne can associate an Adjacency matrix A\, of size n by n where n is the num
 ber of vertices. If the graph is d-regular\, then d is always an eigenvalu
 e of A. Such a graph is called a "Ramanujan graph" if the second largest e
 igenvalue of A is no larger than twice the square root of d-1. In this tal
 k 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 few\, an
 d I will provide a couple of such procedures. Finally\, I will discuss the
  "matrix completion problem" which has applications in many engineering do
 mains\, and show how it can be solved using Ramanujan graphs.\n
LOCATION:https://researchseminars.org/talk/GSWebinars/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ken Ono (University of Virginia)
DTSTART:20210421T120000Z
DTEND:20210421T131500Z
DTSTAMP:20260422T225753Z
UID:GSWebinars/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GSWebinars/4
 /">What is the Riemann Hypothesis\, and why does it matter?</a>\nby Ken On
 o (University of Virginia) as part of Gonit Sora Webinars for Students\n\n
 \nAbstract\nThe Riemann hypothesis provides insights into the distribution
  of prime numbers\, stating that the nontrivial zeros of the Riemann zeta 
 function have a “real part” of one-half. A proof of the hypothesis wou
 ld be world news and fetch a $1 million Millennium Prize. In this lecture\
 , Ken  Ono will discuss the mathematical meaning of the Riemann hypothes
 is and why it matters. Along the way\, he will tell tales of mysteries abo
 ut prime numbers and highlight new advances. He will conclude with a discu
 ssion of recent joint work with mathematicians Michael Griffin of Brigham 
 Young University\, Larry Rolen of Vanderbilt\, and Don Zagier of the Max P
 lanck Institute\, which sheds new light on this famous problem.\n
LOCATION:https://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:20260422T225753Z
UID:GSWebinars/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GSWebinars/5
 /">Mathematics of the football</a>\nby Fernando Rodriguez Villegas (The Ab
 dus Salam International Centre for Theoretical Physics) as part of Gonit S
 ora Webinars for Students\n\n\nAbstract\nHow to build something spherical 
 out of pieces all of roughly the same shape? This problem concerns the str
 ucture of balls for many games\, special molecules\, domes  and viruses. I
 n this talk we will discuss some of the geometry that these structures sha
 re and how the constraints imposed by physical space lead to similar solut
 ions.\n
LOCATION:https://researchseminars.org/talk/GSWebinars/5/
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