Top network posts

• 49 How to show $\lim_{x \to 1} \frac{x + x^2 + \dots + x^n - n}{x - 1} = \frac{n(n + 1)}{2}$?
• 17 What is the fastest way to find the characteristic polynomial of a matrix?
• 16 Why is the FILE structure from stdio.h written in uppercase?
• 11 Multiple parameters in a List. How to create without a class?
• 8 Prefix sums weighted by a polynomial expression, can you do faster?
• 8 Are there more planar graphs on $5n$ vertices than bipartite graphs on $n$ vertices?
• 8 Counting multigraphs up to isomorphism
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