noether

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12 Questions

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5	Looking for a Lyapunov function for the next system
4	Why doesn't the Weierstrass approximation theorem imply that every continuous function can be written as a power series?
3	Does exists a matrix $B$ such that $A^TA=A^TB+B^TA$? with $B^TB$ being a diagonal matrix and $A$ an incidence matrix
3	Checking if one “special” kind of block matrix is Hurwitz
2	If $A$ is positive definite, then $B^TA^{-1}B$ is also positive/negative (semi) definite?

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163 Reputation

+15	Does exists a matrix $B$ such that $A^TA=A^TB+B^TA$? with $B^TB$ being a diagonal matrix and $A$ an incidence matrix
+10	If $A$ is positive definite, then $B^TA^{-1}B$ is also positive/negative (semi) definite?
+5	Why doesn't the Weierstrass approximation theorem imply that every continuous function can be written as a power series?
+10	Finding the steady state error in the Laplace domain

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4 Answers

votes activity newest

1	Finding the steady state error in the Laplace domain
1	Linearization of $ m \dfrac{dy^2}{dt^2} = u(t) - C_d \left( \dfrac{dy}{dt} \right)^2-mg $
0	Lyapunov Stability of Non-autonomous Nonlinear Dynamical Systems
0	Prove if the set is closed? Bounded? Compact?

19 Tags

2 control-theory × 3	0 matrices × 3
1 differential-equations × 3	0 eigenvalues × 3
1 laplace-transform	0 block-matrices × 3
0 linear-algebra × 9	0 general-topology × 2
0 inequality × 4	0 real-analysis × 2

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$Mathematics Stack Exchange$	Mathematics	163 rep	8
	Stack Overflow	86 rep	4

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