'Das Wesen der Mathematik ist ihre Freiheit'
The Essence of the Mathematics is its freedom
Georg Cantor


‘Michele has left this strange world a little before me. This means nothing. People like us, who believe in physics, know that the distinction made between past, present and future is nothing more than a persistent, stubborn illusion.’
Albert Einstein, about death of his friend Michele Besso





personal notes of Renzo Diomedi





, then if n=3 =

,

properties:
and

and

, , , , the reciprocal of a is b and vice versa

then





, ,


,







=




its conjugate = its transpose
































where ~ is the equivalence relation that identifies 2 points if they both lie on the same straight line passing through the origin
































dot and cross prod.:











unit vector, rot.axis





where is parallel and is perpendicular to rotation axis





..............................to be continued

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