cjauvin
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 Oct 13 comment Geometric interpretation of the addition of linear equations in general form As I was studying the question of how to visualize the decision boundaries of a softmax regression model, I realized that the parameters of the decision boundary between class $i$ and $j$ can be computed as $\theta_i - \theta_j$, where the $\theta$s can be interpreted as the parameters of linear equations in general form (as is clear at least for the 2D example I've been studying: cjauvin.blogspot.ca/2013/10/softmax-regression-101.html). I've been trying really hard to find an intuitive way to understand this in geometric terms, to no avail. Oct 13 comment Geometric interpretation of the addition of linear equations in general form Thank you for this interesting answer! I was led to this question through a very indirect path (i.e. a machine learning problem), and I'm not sure if it makes sense to talk about it here, but I'll take a shot at it anyway.. Oct 11 revised Geometric interpretation of the addition of linear equations in general form edited title Oct 11 revised Geometric interpretation of the addition of linear equations in general form title Oct 11 awarded Editor Oct 11 revised Geometric interpretation of the addition of linear equations in general form edited body Oct 11 asked Geometric interpretation of the addition of linear equations in general form Nov 15 awarded Supporter Nov 15 awarded Scholar Nov 15 comment Summing 2 to the power of the subset sums of a power set Many thanks! I am puzzled and greatly impressed by your speed.. is that a reasoning that you made on the fly, or you had somehow thought about a related problem before? Nov 15 accepted Summing 2 to the power of the subset sums of a power set Nov 15 awarded Student Nov 15 asked Summing 2 to the power of the subset sums of a power set