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| bio | website | math.ubc.ca/~israel |
|---|---|---|
| location | Richmond, Canada | |
| age | ||
| visits | member for | 2 years, 2 months |
| seen | 1 hour ago | |
| stats | profile views | 8,676 |
I'm an Emeritus Associate Professor of Mathematics at University of British Columbia and an Optimization Algorithms Researcher at D-Wave Systems in Burnaby BC
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4h |
answered | Finding a matrix with the following property |
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4h |
comment |
Radius of convergence and complex power series Once you have it for first derivative, mathematical induction gives it to you for all orders. |
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4h |
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$2^{q-1}\equiv 1\pmod{q}.$ No, it can't be asking that. Look at the second sentence. You need not only to consider $2^{q-1} \mod q$, but also $2^k \mod q$ for $1 < k < q-1$. |
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4h |
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Easy way to check for a valid solution in this triple equality? You can, but you still need two equations, otherwise you lose some information. So you can use equation 1 and equation 2, or you can use equation 1 and (equation 1 - equation 2), or ... |
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4h |
answered | Basic question on the transformation of Exponential distribution. |
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1d |
answered | About compact operator |
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1d |
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Is't true that for a linear transformation $T:\mathbb R^n\to\mathbb R^n,~T$ is positive definite $\iff\langle Tx,x\rangle>0~\forall~x\ne 0$ $x^t T x$ and $\langle Tx, x\rangle$ are different notations for the same thing (at least when the scalars are real). |
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1d |
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funcitonal series convergence… SOS… This is not a duplicate. The other question just asks about the radius of convergence: the real question here is about the limit of $f(x)$ as $x \to \infty$. |
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2d |
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funcitonal series convergence… SOS… Or are you asking whether $f(x)$ has a finite limit as $x \to +\infty$? |
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2d |
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funcitonal series convergence… SOS… What do you mean by "even $x \to$"? For every given $x$, the series converges. It doesn't converge uniformly, though, if that's what you're asking, because for every $k$ there are $x$ that make the $k$'th term as large as you please. |
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May 21 |
answered | Prove that if $p(A)=0$ where A is a matrix of a linear operator ($A \in L(V)$), $p(\lambda)=0$ if $\lambda \in \sigma(A)$ |
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May 21 |
answered | Incomplete space |
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May 20 |
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Results following from Analyticity on a domain Yes, that's right. |
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May 20 |
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Easy way to check for a valid solution in this triple equality? If the $x$ equations were $$\eqalign{x_1 + 2 x_2 + 3 x_3 &= 0\cr 4 x_1 + 5 x_2 + 6 x_3 &= 0\cr}$$ then the $y$ inequalities would be $$\eqalign{y_1 + 4 y_2 &< 0\cr 2 y_1 + 5 y_2 &<0\cr 3 y_1 + 6 y_2 &<0\cr}$$ |
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May 20 |
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Easy way to check for a valid solution in this triple equality? Each inequality for $y$'s corresponds to an $x$ variable, and each $y$ variable corresponds to an equation for the $x$'s. The coefficients are the same. Thus the coefficient of $x_2$ in the first equation $(-1)$ is the coefficient of $y_1$ in the second inequality. |
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May 20 |
revised |
Why the root of this tree has to be “1”? added 1 characters in body |
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May 20 |
answered | Why the root of this tree has to be “1”? |
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May 20 |
answered | Results following from Analyticity on a domain |
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May 20 |
revised |
Easy way to check for a valid solution in this triple equality? added 578 characters in body |
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May 20 |
answered | Easy way to check for a valid solution in this triple equality? |
