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I captured this picture from the movie A Beautiful Mind.

I see this is a problem solving for the dimension of a quotient space, so I guess $W$ is assumed to be a subspace of $V$, and let's also assume $V$ is a vector space over $\mathbb{Q}$.

I cannot figure out what $X$ is here. Also, how do I solve this?

p ic

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  • Look at http://math.stackexchange.com/questions/284788/what-is-the-solution-to-nashs-problem-presented-in-beautiful-mind – copper.hat Mar 04 '13 at 15:57
  • I thought this question was closed as a duplicate of copper.hat's post, but apparently it was reopened. Is it substantially different? – rschwieb Nov 19 '13 at 14:47

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