LOG#184. Absement, Fourier and transforms.

In this short post, I am going to relate the relatively unknown notion of absement, the quantity     with some common transforms, in particular, with Fourier series and transforms more naturally. The Fourier series for a periodic signal is … Continue reading

LOG#183. Bohrlogy: some pocket formulae.

This post continues the Bohrlogy thread I did some time ago. It aims to parallel electric Bohr (atom), the gravitational Bohr atom and the black hole atom (as new!). Note that , and , . First of all, the common … Continue reading

LOG#182. Duality and gravity: extra thoughts.

In the previous post, I reviewed very naively and shallowly some of the relationships between duality and gravity, and that from electromagnetic duality. There are many other interesting points. This post is aimed to highlight some issues and works that … Continue reading