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2017-11-17 09:30:34 +0200 asked a question Problem with questions
  1. how can you compute (n-1)! mod n for n < 100. Find a formula relating the number of idempotents in Zsubn with the number of distinct prime factors that n has.

  2. An element a in Z(subn) is a square if there is some b element of Z(subn) such that a^2=b. Find the number of squares in Z(sub p^n).

Any help is appreciated, thank you !

2017-11-17 09:30:34 +0200 asked a question What to do to save a plot from notebook?

Is it possible to export a plot, preferable in a vector format from a notebook?