Tom Brown's blog

Many people overseas would already be informed but still this may be interesting. We have real trouble you might know of it unfortunately the first part of this blog entry is bad news. Our main challenges are of an internal social nature. Going into winter available electricity is the immediate and pressing problem the network already cannot cope there are regular interruptions then there is a 5th Corona wave, in effect just after lifting the...

For our purposes there is actually nothing so special about the Moon and the Earth. They are only names and for convenience, the situation holds just the same for any two orbiting bodies: Moon-Earth; moon-planet; planet-Sun; binary stars or a pair of black holes etc. The model should work better with large masses, close proximity and fast rotation but not to extremes because you will have relativistic influence, and the bodies should be...

President Mandela was the only man who could unify South-Africa he was a great man, a man for his time and his dream was of a Rainbow Nation a brotherhood of our people's. He was known for charisma, affection and compassion, love for his country and love for all its people. The President of the Republic of South-Africa Cyril Ramaphosa is a leader of great integrity, reason and knowledge. He is our leader and worthy and as such has to be honoured...

page 1 The idea of a semi-group appeals strongly to the everyday experience of time. Page 2 A restriction, a kind of “reversibility property” may be assumed, that is the existence of inverses. This leads to the concept of a dynamical system which is very popular in Poland. Page 3 Examples of semigoups in one-dimensional phase space as well as two examples of trajectories through 2D. They are all based on properties of the exponential function,...

The scans illustrate typical behaviour of graphs, the equations in themselves are not important just the shapes. The sketches are not accurate one needs only to understand the characteristic properties. With this blog I am trying to explain some concepts to a layman. page 1 These two sketches illustrate some types of long term behavior of curves such as bounded or unbounded graphs, singularity, limits and asymptotes. page 2 A sequence of...