mok

mok, 12 days ago to math

https://x.com/Anthony_Bonato/status/1790779152351494241
@mathematics
#math

mok, 17 days ago to mathematics

Mathematician James Harris Simons, known for the classification of holonomy of 3D manifolds and his famous Chern-Simons form, passed away on May 10, 2024, in New York City, at age 86.

Despite his later cooperation with NSA to help US to invade Vietnam and entering financial business (which is notorious for redistributing wealth to enlarge economic inequality), his legacy in #mathematics and #physics still benefits our exploration in secrets of the universe.

@physics @mathematics

mok, 1 month ago to mathematics

I just entered several #Guppe groups (e.g.
@mathematics
@physics
) but the groups just keep silent from my point of the view.
I wonder if it is just because nobody posts for the past 12 hours or some other technical issues (or I just misunderstand the mechanism of it)?

gregeganSF, 1 month ago to random

No smooth curve that lies on a sphere can contain an inflection point (a point where the curvature is zero).

But on a surface of constant negative curvature, like this tractroid, no such obstacle exists, and every non-meridian geodesic on the tractroid has 2 inflection pts (black).

mok, 2 months ago to Astronomy

Save the Chandra X-ray Observatory
https://www.savechandra.org/

> A legendary Great Observatory is proposed for cancellation in the FY25 President’s Budget Request. It’s not too late.

#SaveChandra #Astronomy