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Alexander Vigodner's user avatar
Alexander Vigodner's user avatar
Alexander Vigodner's user avatar
Alexander Vigodner
  • Member for 11 years
  • Last seen more than a week ago
  • New York, United States
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I am a mathematician with specialization in Control Theory, Optimization and Statistics. I am a quant.

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17
What does Determinant of Covariance Matrix give?
Aug 6, 2014
answer
12
Problem in the second-derivative symbol.
Oct 14, 2014
answer
5
Arithmetic Mean, Geometric Mean, Harmonic Mean and their relations
Aug 20, 2014
question
4
Not enough degrees of freedom in Euler Lagrange equation
Jul 10
answer
4
Solving the system of differential equations
Mar 10, 2015
answer
3
Does an upper triangular matrix always have $\langle 1,0,0\rangle$ as one of its normalized eigenvectors?
Mar 19, 2015
answer
3
How to show this equals 1 without "calculations"
Sep 18, 2014
answer
3
In constrained optimization problems, when is 'naive' substitution possible?
Jun 16, 2014
answer
2
Derivative of a time derivative
Aug 14, 2014
question
2
Units of vaiance when variable is in %.
Aug 29, 2014