Khristo Nonev Boyadzhiev In Memoriam

Journal of Geometry and Symmetry in Physics 73 (2025) 63–73

KHRISTO NONEV BOYADZHIEV IN MEMORIAM

Mihai Caragiu and Dimitar Bakalov

 

What Are Lie Groups? - Quanta Magazine

"By combining the language of groups with that of geometry and linear algebra, Marius Sophus Lie created one of math’s most powerful tools."

Read at https://www.quantamagazine.org/what-are-lie-groups-20251203/

 

Image source:

E8 Petrie projection

https://en.wikipedia.org/wiki/Lie_group#/media/File:E8Petrie.svg

A Jean Bourgain quote

“If you have a question which is generally perceived as unapproachable, it’s often you don’t even quite know where to look to find a solution. From that point of view, we are . . . stranded in the desert, hopelessly lost. At the moment you get this insight, all of a sudden you’ll escape the desert and things open up for you. Then we feel very excited. These are the best moments. They make all the suffering, with absolutely no progress, they really make it worth it.” (SOURCE: Jean Bourgain, problem solver by Terence Chi-Shen Tao - PNAS 116 (28) 13717-13718 June 17, 2019,  https://doi.org/10.1073/pnas.1901965116)

The Math Pontiff

Pope Leo XIV earned a BS in Mathematics from Villanova University in 1977. 

Interesting.

Eurasian Jay in a tree

 Source: Wikimedia Commons

on a busy day - one of my math chalkboards

 

Belief Revision (AGM Basics)

 

Steven Strogatz - Two dimensional linear systems

Nonlinear Dynamics and Chaos - Steven Strogatz, Cornell University (MAE 5790 - Introduction to nonlinear dynamics)

Arithmetic dynamics (Joseph Silverman)

 

Rush - Tom Sawyer

 

A short classroom exercise on partially ordered sets

 

Clasa XII C 1982 Liceul Mihai Viteazul Ploiesti