Dirk Lorenz
@dirque.bsky.social
Doing mathematics, also as a job. Now at Uni Bremen, was at TU Braunschweig. Only here for the math. Optimization, inverse problems, imaging, learning - stuff like that.
I sample points uniformly on the sphere and then look at them on a map (in longitude and z-coordinate).
STILL UNIFORMLY DISTRIBUTED! 🤯
(Quite a nice fact that is special to three dimensions: Each coordinate of a random vector uniformly on the uni sphere is uniform in [-1,1].)
#🧮
STILL UNIFORMLY DISTRIBUTED! 🤯
(Quite a nice fact that is special to three dimensions: Each coordinate of a random vector uniformly on the uni sphere is uniform in [-1,1].)
#🧮
June 19, 2025 at 2:11 PM
I sample points uniformly on the sphere and then look at them on a map (in longitude and z-coordinate).
STILL UNIFORMLY DISTRIBUTED! 🤯
(Quite a nice fact that is special to three dimensions: Each coordinate of a random vector uniformly on the uni sphere is uniform in [-1,1].)
#🧮
STILL UNIFORMLY DISTRIBUTED! 🤯
(Quite a nice fact that is special to three dimensions: Each coordinate of a random vector uniformly on the uni sphere is uniform in [-1,1].)
#🧮
Look at what I produced!
(\usepackage[cm]{sfmath} for more drama).
(\usepackage[cm]{sfmath} for more drama).
![LaTeX output of \bar{\underline{\Xi}} with \usepackage[cm]{sfmath}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:jzmodove42ayo5o6x6o3eu4c/bafkreibznkjxtgurvwok2aijkif5daycbfsdf3xkkuskyv2tacjxje7pyu@jpeg)
June 2, 2025 at 8:13 PM
Look at what I produced!
(\usepackage[cm]{sfmath} for more drama).
(\usepackage[cm]{sfmath} for more drama).
Very nice! Reminds of this poem by the Austrian writer Ernst Jandl
April 27, 2025 at 5:29 PM
Very nice! Reminds of this poem by the Austrian writer Ernst Jandl
Well, there is this (taken from www.lesswrong.com/posts/Ng5n8F...), so is likely in the 75%-95% range…
April 4, 2025 at 8:15 AM
Well, there is this (taken from www.lesswrong.com/posts/Ng5n8F...), so is likely in the 75%-95% range…
A mobile with cloth pins for some photos (and other light stuff).
Sculptures of a thinker and of Ganesha (both presents of former group members).
Sculptures of a thinker and of Ganesha (both presents of former group members).
March 19, 2025 at 11:10 AM
A mobile with cloth pins for some photos (and other light stuff).
Sculptures of a thinker and of Ganesha (both presents of former group members).
Sculptures of a thinker and of Ganesha (both presents of former group members).
Another graduate student! Second to last one from TU Braunschweig - Emanuele Naldi graduated today with distinction!
(Off topic remarkv Tbh, the best fitting suits I've seen in a thesis defense.)
(Off topic remarkv Tbh, the best fitting suits I've seen in a thesis defense.)
January 17, 2025 at 10:40 PM
Another graduate student! Second to last one from TU Braunschweig - Emanuele Naldi graduated today with distinction!
(Off topic remarkv Tbh, the best fitting suits I've seen in a thesis defense.)
(Off topic remarkv Tbh, the best fitting suits I've seen in a thesis defense.)
@tomkalei.bsky.social finishing his talk in our Colloquium on "The theories of oids" 😉
January 14, 2025 at 3:57 PM
@tomkalei.bsky.social finishing his talk in our Colloquium on "The theories of oids" 😉
Can be found quite frequently on menus in Italy. It's called Pizza Americana and some Italian twentysomethings told me that this was their favorite childhood option.
January 13, 2025 at 4:26 PM
Can be found quite frequently on menus in Italy. It's called Pizza Americana and some Italian twentysomethings told me that this was their favorite childhood option.
Nice to be back to my old view! And it comes with some snow!
January 10, 2025 at 11:47 AM
Nice to be back to my old view! And it comes with some snow!
It's a good idea indeed. It is so good that many kids in Germany between age 3 and 6 have this as one of their main modes of transportation. They still may need a few days to transition to a paddling bike though.
January 6, 2025 at 6:57 PM
It's a good idea indeed. It is so good that many kids in Germany between age 3 and 6 have this as one of their main modes of transportation. They still may need a few days to transition to a paddling bike though.
How about this? Looks like a line integral (along a non-closed line) to me btw
January 4, 2025 at 2:22 PM
How about this? Looks like a line integral (along a non-closed line) to me btw
I am at the point in my life where the family calendar gets smaller
January 2, 2025 at 1:44 PM
I am at the point in my life where the family calendar gets smaller
Our awesome students made this announcement of the Christmas lecture I am about to give tomorrow here @unibremen.bsky.social !
December 16, 2024 at 8:39 AM
Our awesome students made this announcement of the Christmas lecture I am about to give tomorrow here @unibremen.bsky.social !
I have an open postdoc (or phd) position!
You know PINNs? You are interested in hands-on applications and love to work in a larger project? Then this position is for you!
Please reach out if you have any questions!
(Job ad only in German, unfortunately…)
www.uni-bremen.de/en/universit...
You know PINNs? You are interested in hands-on applications and love to work in a larger project? Then this position is for you!
Please reach out if you have any questions!
(Job ad only in German, unfortunately…)
www.uni-bremen.de/en/universit...
December 13, 2024 at 9:58 AM
I have an open postdoc (or phd) position!
You know PINNs? You are interested in hands-on applications and love to work in a larger project? Then this position is for you!
Please reach out if you have any questions!
(Job ad only in German, unfortunately…)
www.uni-bremen.de/en/universit...
You know PINNs? You are interested in hands-on applications and love to work in a larger project? Then this position is for you!
Please reach out if you have any questions!
(Job ad only in German, unfortunately…)
www.uni-bremen.de/en/universit...
Post someone you've been told you look like who you definitely don't look like.
December 7, 2024 at 7:28 AM
Post someone you've been told you look like who you definitely don't look like.
People discussing who was first to use attention while clearly it was Fermat who introduced the concept of attention to scientific research with his marvellous margin note.
December 6, 2024 at 7:49 AM
People discussing who was first to use attention while clearly it was Fermat who introduced the concept of attention to scientific research with his marvellous margin note.
Something like this?
November 20, 2024 at 8:56 AM
Something like this?
Google scholar turned 20 and this is how it's celebrated
November 18, 2024 at 9:11 PM
Google scholar turned 20 and this is how it's celebrated
November 15, 2024 at 6:18 AM
Bluesky now has over 10 million users, and I was #794,815! Funny enough, that I joined on my birthday
September 20, 2024 at 6:53 PM
Bluesky now has over 10 million users, and I was #794,815! Funny enough, that I joined on my birthday
Well, I for one do not care for the Japanese chalk. Here in Germany we have awesome blackboards. No need for fancy chalk. Hagoromo does not write any better than the quite cheap Giotto Robercolor
August 6, 2024 at 4:17 PM
Well, I for one do not care for the Japanese chalk. Here in Germany we have awesome blackboards. No need for fancy chalk. Hagoromo does not write any better than the quite cheap Giotto Robercolor