bio  website  math.ubc.ca/~israel 

location  Vancouver BC  
age  63  
visits  member for  3 years, 9 months 
seen  7 hours ago  
stats  profile views  5,209 
Associate Professor Emeritus, University of British Columbia, and Optimization Algorithms Researcher, DWave Systems, Burnaby BC
11h

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Approximating an integral
An easy limit (definition of derivative of $(12\pi x\theta)^{m}$ at $x=0$). 
12h

revised 
Uniformly bounded operator family and pointwise convergence
added 1019 characters in body 
13h

answered  Uniformly bounded operator family and pointwise convergence 
14h

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Uniformly bounded operator family and pointwise convergence
By Fatou's lemma you can't have $Q_n u \to u$ pointwise a.e. if $\u\ > 0$ and $\Q_n\ < 1$, so the condition $\Q_n\ \le C/n$ isn't going to work. 
Dec 15 
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Approximating an integral
The singularity at $s=0$ in your integrand is a removable singularity. Therefore Igor doesn't need to consider a residue at $s=0$. 
Dec 15 
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Approximating an integral
The singularity at $0$ is removable. 
Dec 10 
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A problem on about a matrix norm on $\mathfrak{su}(4)$
Obviously $A=0$ might not work. The "solve for $F$" should be interpreted as "find $F$ if it exists, otherwise output 'does not exist'". But $\det(B \pm iI)$ could be $0$, e.g. $B$ could be diagonal with some entries $\pm i$. 
Dec 5 
answered  Does very fast convergence in probability imply almost sur convergence for a continuous stochastic process? 
Dec 5 
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Is the Jacobi theta function invertible?
Normally there would be no "Re" in the definition. If it's there, how do you expect to find the imaginary part of $z$? 
Dec 5 
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Is the Jacobi theta function invertible?
Which Jacobi theta function? There are four of them, and they are functions of two variables. They are certainly not onetoone. 
Dec 4 
answered  How to convert nonPSD matrix to PSD matrix? 
Dec 4 
revised 
Upper and lower limits
added 227 characters in body 
Dec 4 
answered  Upper and lower limits 
Dec 4 
answered  Characteristic polynomial of Kronecker/tensor product 
Dec 3 
answered  Analytic solution $\underset{n} {\mathrm{argmin}} \frac{a}{r + ns} + \sum_{i=0}^{n1}\frac{b}{r + is}$ 
Dec 1 
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perturbation of Invariant subspaces
If $V$ is invariant under $C$, then for every $v \in V$, $Bv = v + t C v \in V$. Similarly the other way. 
Dec 1 
answered  perturbation of Invariant subspaces 
Nov 30 
awarded  Enlightened 
Nov 30 
awarded  Nice Answer 
Nov 28 
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How to test if the power of some algebraic number is the rational combination of two specific algebraic numbers?
How do you define "compute all" if there are infinitely many? 