wckronholm
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 1d reviewed Approve Diagonalizing, Eigenvalues and Eigenspaces Apr 16 reviewed Reject What is the usefulness of matrices? Apr 16 reviewed Approve Line Equations $(a, b, 0)$ and $(0, 0, 1)$ Mar 3 awarded Nice Answer Nov 30 awarded Notable Question May 4 awarded Yearling Feb 6 reviewed Reject Proof of geometric sum relation by mathematical induction Jan 26 revised How to find the inverse arc in the configuration space Minor LaTeX edits. Dec 10 reviewed Approve Basic set theory proof about cardinality of cartesian product of two finite sets Dec 5 comment Finitely generated modules Dec 5 comment Components are clopen in a space with a finite number of connected components Each component is closed. Hence, the complement of each component is open. But each component is itself a finite intersection of complements of components, hence is also open. Oct 30 reviewed Approve how to proceed ? Have I correctly transformed the question to an equation? Oct 30 comment Find all numbers $c$ that satisfy Mean Value Theorem Not all of these solutions are in the specified interval, however. Oct 30 comment Find all numbers $c$ that satisfy Mean Value Theorem The derivative is $\frac{1}{3}x^{-2/3}$, which is different from what you have written. Oct 29 reviewed Edit Getting $P^1$ by the sphere $S^1$ Oct 29 revised Getting $P^1$ by the sphere $S^1$ correct spelling Oct 29 reviewed Approve Differentiation of a circle Oct 29 reviewed Reject Selecting groups of items: How many ways can we divide n students into groups of two? Oct 6 reviewed Approve How to prove $\frac{(a_1 a_2\cdots a_n)^2-1}{8}\equiv\sum_{i=1}^n\frac{a^2_i -1}{8}\pmod 8$ Oct 6 answered Help explaining sum notation