combinatorics - Gonit Sora

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combinatorics

A collection of 7 posts

Combinatorial applications of some topological theorems

Borsuk Ulam Theorem

Combinatorial applications of some topological theorems

Prof. Ravindra B. Bapat of the Indian Statistical Institute, New Delhi gave a talk on 28th November, 2020 about “Combinatorial applications of some topological theorems“. The full video of the talk is available in our YouTube channel as well as below. A list of all past and future webinars are

CAT(0) Geometry

The geometry of a robotic arm in a tunnel

Dr. Cesar Ceballos of the Technical University of Graz, Austria gave a talk on 20th November, 2020 about “The geometry of a robotic arm in a tunnel“. The full video of the talk is available in our YouTube channel as well as below. A list of all past and future

The many colors of Combinatorics

The many colors of Combinatorics

Gonit Sora organized a webinar on 8 August 2020, which was delivered by Dr. Nishad Kothari (IIT Madras). The full video of the talk is available in our YouTube channel as well as below. The slides of the talk can be downloaded here. For a list of all our past

The Remarkable Sequence 1, 2, 7, 42, 429, ...: The story of Alternating Sign Matrices

Alternating Sign Matrices

The Remarkable Sequence 1, 2, 7, 42, 429, ...: The story of Alternating Sign Matrices

The sequence in the title is given by the following ‘nice’ formula or, in product notation Here denotes the product . This formula was conjectured by Mills, Robbins and Rumsey to count what are called alternating sign matrices (ASMs), which is the subject of this post. An alternating sign matrix (ASM)

$Wonders of The Pigeonhole Principle$

Wonders of The Pigeonhole Principle

The Department of Mathematics, NIT Silchar organized a one week workshop on “Innovative and contemporary teachers’ training in Mathematics” (ICTM 2017) from 14th – 18th August 2017. The workshop was coordinated by Dr. Kedar Nath Das, Assistant Professor, Department of Mathematics, NIT Silchar. The workshop was successfully conducted with experienced resource

Is it me, or is "Veto" starting to sound really good

Is it me, or is "Veto" starting to sound really good

Our heroes from the previous story, Shapley, Shubik and Banzhaf are on a trip today. They’re going to New York, for the United Nations Security Council meeting. This powerful institution consists of delegates from fifteen member states: five permanent and ten non-permanent. All decisions are made with a minimum

Simple concepts Tough problems

Simple concepts Tough problems

References: 1. Mathematical Circles (Russian Experience); Dmitri Fomin, Sergey Genkin, Ilia Itenberg; Translated from Russian by Mark Saul; Volume 7; American Mathematical Society; ISBN 0-8218-0430-8. Well … please don’t worry !! You are not in the end of the article !! It’s in fact the beginning … I know it’s crazy