Abel Jansma
npub13tlmxlnkeuj53v7knaa3jrccpd3jwjl5ewmuev4vlh84ly9ap8msgchj5x@drss.io
A short koan about the spider Oza
28 Oct 2025
A short koan about the spider Oza
28 Oct 2025
A rabbi asked the wise spider Oza: “Tell me, why is there something rather than nothing?” Oza: “you are confused—both are: the something in that it is, and the nothing in that it
Complex Systems and Quantitative Mereology
28 Jan 2025
Have a look at these three rings: Why are they connected? If you only consider two of the rings and ignore the third, then any pair can be smoothly separated. The triplet is connected and
The Encyclopedia of Mobius Inversions in the Sciences
28 Jan 2025
Complex Systems and Quantitative Mereology
28 Jan 2025
A Möbius inversion theorem for modules and vector spaces
28 Jan 2025
A Möbius inversion theorem for modules and vector spaces
28 Jan 2025
In a previous post (https://abeljansma.nl/2025/01/28/mereoPhysics.html), I proposed to study complex systems through a mereological lens by applying the Möbius inversion theorem. This has become my
The Encyclopedia of Mobius Inversions in the Sciences
28 Jan 2025
In a recent paper (https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.7.023016), I proposed to study complex systems through a mereological lens by applying the Möbius inversion
Möbius Functions on Powerset Antichains
9 Feb 2024
UPDATE: I have now found an explicit formula for the Möbius function on the redundancy lattice. This will appear in a preprint soon.
Möbius Functions on Powerset Antichains
9 Feb 2024
Introducing: Stator
21 Dec 2023
In my PhD thesis, I developed a method and software package to infer interactions and cell states from gene expression data. Both the software and the research are now published!
Introducing: Stator
21 Dec 2023
A simple origami swallow
2 Sep 2023
I was completely mesmerised by the swallows in Portugal, and while playing around with some origami paper, I came up with this simple design for an origami swallow. It is based on the famous ‘crane
A simple origami swallow
2 Sep 2023
The do-calculus of sampling from restricted Boltzmann machines
9 Jan 2023
Generative models, in particular energy-based models, are often used to sample from conditional distributions–a process known as inpainting. One of the most fundamental kinds of generative
The do-calculus of sampling from restricted Boltzmann machines
9 Jan 2023
Using the Open Game engine to model MEV
15 Dec 2022
(This is an update on my Ethereum Protocol Fellowship. More updates can be found here ).
Using the Open Game engine to model MEV
15 Dec 2022
A proportionality proof for the BigPlayer rule
1 Dec 2022
(This is an update on my Ethereum Protocol Fellowship. More updates can be found here ).
A proportionality proof for the BigPlayer rule
1 Dec 2022
Compositionally sharing pie fairly
29 Nov 2022