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 2d reviewed Approve If $AB = BA$ and $AC = CA$, prove that $BC = CB$ Apr 26 comment Show using Riemann sum that error approximation is bounded above by $\frac{7}{n}$ Try to do the case $n = 1$ and $n = 2$ first. Apr 26 comment an analytic function being zero Yep, precisely. Apr 26 awarded Good Answer Apr 26 answered an analytic function being zero Apr 26 answered Chain rule for general manifolds Apr 26 answered diagonalizability implies existence of an inner product wrt an operator is normal Apr 26 revised I think im missing linear property in this normed vector space how should i approach? misread the question Apr 26 revised Prove that $f(x)$ is irreducible iff its reciprocal polynomial $f^*(x)$ is irreducible. edited body Apr 26 comment Prove that $f(x)$ is irreducible iff its reciprocal polynomial $f^*(x)$ is irreducible. It is enough to assume that $f(0) \neq 0$ and $\deg f > 1$ to have $\left( f^{*} \right)^{*} = f$ and so with some careful modifications, it seems that the proof does go through. Thanks for the correction! Apr 26 revised Prove that $f(x)$ is irreducible iff its reciprocal polynomial $f^*(x)$ is irreducible. added 594 characters in body Apr 25 answered Prove that $f(x)$ is irreducible iff its reciprocal polynomial $f^*(x)$ is irreducible. Apr 25 comment Determining a basis for the subspace of T(2,2) consisting of transformations such that T(v) = 0 for a specific vector v You still obtain a basis. Try this with $\mathbf{v} = (0,1)$. Apr 25 answered I think im missing linear property in this normed vector space how should i approach? Apr 25 answered Find all Points on the Surface at which the Tangent is Parallel to the Plane Apr 25 comment Determining a basis for the subspace of T(2,2) consisting of transformations such that T(v) = 0 for a specific vector v Yes - if the vector $\mathbf{v}$ is not given to you explicitly, the best you can get is to express the basis for $S$ in terms of the coordinates of $\mathbf{v}$ (which are not known) like you did. Apr 25 answered Determining a basis for the subspace of T(2,2) consisting of transformations such that T(v) = 0 for a specific vector v Apr 25 revised Determining a basis for the subspace of T(2,2) consisting of transformations such that T(v) = 0 for a specific vector v Latex notation. Apr 25 answered Limit of a complex sequence Apr 25 answered Equivalence Class of functions and properties examples