The study of topology and its applications in differential geometry.
1.Welsh National Opera 2.Oscar Peterson Trio 3.Billy Bragg & Wilco 4.The Original London Cast 5.James Hunter......And so on.
The scientific literature.
1.Maybe, guys, you have invented algebra, but that we have learned to use it.
2.Mathematics - this is the only perfect method to drive himself to the nose.
Albert Einstein
3.In mathematics there is no character for the vague thoughts.
Henri Poincare