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Mathematics
Rafa Budría's user avatar
Rafa Budría's user avatar
Rafa Budría's user avatar
Rafa Budría
  • Member for 7 years, 11 months
  • Last seen this week
  • Spain
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Mathematics teacher, degree in Physics. There are many details worth the effort to explore.

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6
Is dot product the only rotation invariant function?
Apr 17, 2017
5
Inertia tensor for a spherical shell
Mar 24, 2017
5
Taylor's theorem Cauchy's remainder question.
May 6, 2017
5
PDE with mixed derivative
Jun 28, 2017
5
Finding orthogonal surface
Apr 14, 2017
4
Is there a flaw in the theory of fractional calculus?
Feb 25, 2017
4
$u_{xx} − 7u_{tx} + 12u_{tt} = 0$ (Partial Differential Equations)
Jun 2, 2017
4
Why is the normal vector $\nu= \frac{y-x}{r} $ for a unit ball in the divergence theorem?
Feb 22, 2020
4
Why $\mathbf n\cdot(\mathbf L^T\mathbf n)=\mathbf n\cdot(\mathbf D\mathbf n)$?
Apr 13, 2017
4
prove existence of the limit of a sequence
Nov 26, 2018
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Is there a way to actually delete the posts I deleted?