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1d
revised Factor the matrix (scalar $\times A$) into permutations of $A$
(1,3) entry of first matrix was wrong.
1d
comment Does the function of a random variable have the same transition matrix as the variable itself?
There is a theorem of Sierpinski that a function from $\mathbb R$ to $\mathbb R$ is Borel measurable iff its graph is a Borel set. So if $f$ is injective and Borel measurable, $f^{-1}$ is also Borel measurable.
1d
comment Does the function of a random variable have the same transition matrix as the variable itself?
$f(X) \in B$ is always the same as $X \in f^{-1}(B)$. If $f$ is an injection and $f$ and $f^{-1}$ are Borel functions, the $\sigma$-algebras generated by $f(X)$ and $X$ are the same.
1d
revised Separable solution to a nonlinear parabolic PDE
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2d
revised Separable solution to a nonlinear parabolic PDE
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2d
comment Separable solution to a nonlinear parabolic PDE
Are you quoting the PDE correctly? Where are you getting that second derivative with respect to $x$? There's no derivative with respect to $x$ at all in the equation you gave.
2d
answered Separable solution to a nonlinear parabolic PDE
2d
revised Condition on matrix to ensure nontrivial Jordan canonical form
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2d
answered Condition on matrix to ensure nontrivial Jordan canonical form
2d
answered Differential equations (second edition) - William E. Boyce & Richard C. Diprima (#$31$, page $142$)
2d
revised Solution space for quadratic equations with nilpotent matrices
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2d
revised Solution space for quadratic equations with nilpotent matrices
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2d
answered Solution space for quadratic equations with nilpotent matrices
2d
comment Solution space for quadratic equations with nilpotent matrices
Actually that should be $6$ solutions, since $- v$ is a solution if $ v$ is.
2d
awarded  Necromancer
Feb
11
answered Graduate probability: bounding the third moment
Feb
11
revised What is the the integral of $\sqrt{x^a + b}$?
added 354 characters in body
Feb
11
answered What is the the integral of $\sqrt{x^a + b}$?
Feb
11
comment What type of series is $A_1 + A_2 n + A_3 \frac{n(n+1)}{2}$
Not quite a recurrence, because the $something$ depends on $k$.
Feb
11
revised Alternative methods to solve DLP for $GL_{3}(\mathbb{F}_2)$
added 363 characters in body