Mathematics 404A        Spring 2005


Problems for your portfolio

  1. Prove this theorem: fix a field F and a non-negative integer n. The dimension of a vector space V over F is n if and only if V is isomorphic to Fn. Furthermore, show that if V has dimension n and W has dimension k with n not equal to k, then V and W are not isomorphic. Your solution should start from the definitions and build up from there, proving everything that you need along the way.
  2. Prove this theorem: any finite subgroup of the group of units of a field is cyclic. Do this by following the outline presented here (PDF file) or here (LaTeX file).
  3. Write an essay on your experiences in this course (and Math 403, and also Math 402 if you took it with me) combining writing and mathematics. Some questions you might consider: What writing-focused aspects of the course worked well for you (for example, revising, peer-critiquing, etc.)? Did paying attention to the writing help your understanding of the mathematics? Did your mathematical writing improve much? Please don't limit yourself to these questions; examine the topic from whatever angles you want.
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       John Palmieri    Padelford C-538    (206) 543-1785    email    web page