mpiktas

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933 reputation

620

bio	website	vzemlys.wordpress.com
	location	Vilnius, Lithuania
	age	32
visits	member for	2 years, 5 months
	seen	May 8 at 13:51
stats	profile views	430

* denotes convolution, $\cdot$ denotes multiplication

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Google+: https://plus.google.com/112784314334842289710/
Twitter: https://twitter.com/#!/mpiktas
Github: https://github.com/mpiktas and https://github.com/vzemlys

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34 Answers

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11	Is there a name for the matrix $X(X^tX)^{-1}X^{t}$?
7	Landmarks of subjects of mathematics
5	medians and medoids are to 2, as X and Y are to 3
5	Compactness of topology on $[0,\infty)$
5	generalized normal distribution with additional kurtosis parameter

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933 Reputation

+10	What is the difference between $\mathbf X\mathbf X^\prime$ and $(\mathbf X-\mu)(\mathbf X-\mu)^\prime$?
+10	Is there a name for the matrix $X(X^tX)^{-1}X^{t}$?
+5	Example of atlas for sequence space
+5	Invertibility of Toeplitz operator in $\ell_1$

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8 Questions

votes activity newest

12	The infinite-dimensional limit of sequence of solutions of linear equations when the number of equations goes to infinity
6	Invertibility of Toeplitz operator in $\ell_1$
6	Do the maximal eigenvalues of $(X^TX)^{-1}$ matrix increase when number of columns of $X$ increases?
6	Finding standard ellipse characteristics from specific ellipse parametrisation
2	Given collection of sets how to turn it to collection of disjoint sets?

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42 Tags

30 statistics × 9	5 probability-theory × 4
28 linear-algebra × 10	5 homework × 3
20 probability × 10	5 stochastic-processes × 3
6 matrices × 5	5 terminology
6 probability-distributions × 2	5 general-topology

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