sand dollar. n. 1. Any of various thin circular echinoderms of the order Clypeasteroida, especially Echinarachnius parma, of coastal northern Atlantic and Pacific waters, having a covering of short movable spines.
One reason why linear algebra is very useful is that linear transforms of normal variables are normal. If x ~ N(a, A), then Bx+b ~ N(Ba+b, BABT). In a way, when everything is linear and normal, everything is nice and analytically tractable.
7 Risks of computer algebra systems It is good to anticipate problems and pitfalls, when enhancing a course with a computer algebra system. Guidelinesfor using computer algebra systems in the classrooms exist for a long time (i.e. [2]).Here is a list:â¢ Technological glitches are not anticipated. Risks of computer algebra systems It is good to anticipate problems and pitfalls, when enhancing a course with a computer algebra system. Guidelinesfor using computer algebra systems in the classrooms exist for a long time (i.e. [2]).