One mathematical problem in combinatorical topology: my lecture at the conference Group 32 in Prague

We formulate one mathematical problem, which will be useful in Quantum Gravity problematics. We will call, that a circle with finite length and finite circumference, which could be deformed, is a ring: let’s have a finite collection of N rings, which could not touch. Derive a formula for number of non-homeomorphic structures, which could be constructed from this finite collection of rings; Every two rings could be linked only once, they could not be knotted or twisted.

Causal set approach to Quantum Gravity

Causal set approach to Quantum Gravity is a quite new theory developed at late 80’s and 90’s of last century. It is a discrete approach to Quantum Gravity, by contrast with string theory or loop quantum gravity. And it is the only theory so far, which gave us a plausible bound on the value of the cosmological constant! These are slides from my lecture in Nuclear Physics Institute in Řež in Czech republic.

Some of my reccordings

There are my reccordings of A.N.Scriabin, F.Chopin, T.Yoshimatzu and myself: A.Scriabin – Etude op.42, no.4; A.Scriabin – Etude op.8, no.12; A.Scriabin – Prelude op.11, no.4; A.Scriabin – Prelude op.11, no.6; A.Scriabin – Prelude op.13, no.1; F.Chopin – Etude op.25, no.1, T.Yoshimatzu – Prelude to little spring, J.N. – Landing (2011)