In the mathematical literature, numerous bounds can be found for the spectral norm of a matrix. Can we improve these bounds if the matrices are known to be Hermitian or even real symmetric semidefinite?
Continue reading Spectral Norm Bounds for Hermitian Matrices
On Monday, February 23, 2015, I gave a talk in the tools seminar at my university about three tools that are useful when working remotely on another computer and that I use a lot:
Regarding secure shell, I explained how to use several of the programs that are part of OpenSSH. Grid Engine is a software suite for cluster management and you have to use it in order to submit jobs to the cluster of the mathematics department at my university. Screen is a window manager for terminals and offers--among other things--persistent shell sessions. Screen is not a program for remote computer access but I felt that that persistent shell sessions integrate nicely with remote computer work.
You can download the presentation slides here (PDF).
On October 20, 2014 Cornelia Gamst and me gave a short talk on Git (Wikipedia) in the tools seminar at the Berlin Institute of Technology. The target audience were people who did not know what a version control system is or who had not used Git before hence we gave reasons why revision control is a good thing and why we use Git for it. The Git introduction itself was brief and included only the basic workflow though we had the opportunity to demonstrate some of the more powerful Git abilities during the hands-on exercise.
The slides are available from the website of the tools seminar.