User nonremovable

26 votes

3 answers

57k views

Distribution of the difference of two normal random variables.

asked Sep 2, 2014 at 17:46

10 votes

3 answers

617 views

Law of Cosines: Proof Without Words

geometry trigonometry

asked Jul 13, 2020 at 10:15

6 votes

3 answers

1k views

Prove an inequality using the Cauchy -Schwarz Inequality [duplicate]

linear-algebra inequality

asked Oct 26, 2015 at 11:42

6 votes

1 answer

199 views

Does pointwise convergence imply that a subsequence converges in measure?

measure-theory convergence-divergence

asked Nov 2, 2015 at 12:46

5 votes

4 answers

337 views

Is this statement meaningful if one of the elements is undefined?

real-analysis

asked Aug 30, 2014 at 13:25

4 votes

4 answers

302 views

Sequence proof (by induction, presumably) giving me trouble. [duplicate]

real-analysis sequences-and-series

asked Aug 28, 2014 at 17:47

4 votes

2 answers

18k views

Proof that if $Z$ is standard normal, then $Z^2$ is distributed Chi-Square (1).

probability statistics normal-distribution moment-generating-functions

asked Sep 10, 2014 at 1:22

4 votes

1 answer

268 views

Prove an equality ($L^P$ spaces)

measure-theory lebesgue-integral lp-spaces

asked Nov 9, 2015 at 12:12

4 votes

3 answers

476 views

Verifying the period of $f(x)=\sin(x)+\cos(x/2)$

calculus trigonometry periodic-functions

asked Jul 8, 2020 at 10:50

4 votes

1 answer

932 views

Find the Laurent Expansion of $f(z)$

calculus complex-analysis power-series laurent-series

asked Apr 8, 2015 at 18:50

3 votes

1 answer

324 views

Show that $z^n+nz-1$ has $n$ zeros in $D(0,R)$

complex-analysis roots

asked Apr 21, 2015 at 18:18

3 votes

4 answers

182 views

When will $\operatorname{det}\left(A\cdot A^{\top}\right)=0$?

linear-algebra determinant

asked May 18, 2015 at 12:53

3 votes

1 answer

136 views

What kind of a function is $y=2^{\frac{1}{x}}$?

calculus functions

asked May 29, 2020 at 10:34

3 votes

1 answer

2k views

Bayesian posterior variance

probability statistics bayesian

asked Dec 3, 2014 at 0:56

3 votes

1 answer

110 views

Show that there is $z_0$ on the unit circle such that $|p(z_0)|>1$. [duplicate]

complex-analysis polynomials

asked Mar 19, 2015 at 15:01

2 votes

1 answer

352 views

Confused about this definition of limit superior.

real-analysis sequences-and-series limsup-and-liminf

asked Jan 29, 2015 at 17:01

2 votes

2 answers

798 views

Find the median of a function of a normal random variable.

probability statistics moment-generating-functions

asked Sep 12, 2014 at 19:43

2 votes

1 answer

355 views

Find $E[S]$ where $S$ is the standard deviation of a random sample from a $N(\mu,\sigma^2)$ population.

probability normal-distribution expectation

asked Sep 25, 2014 at 18:57

2 votes

1 answer

275 views

Is this example of diagonalizable matrix in error?

linear-algebra diagonalization

asked Oct 20, 2015 at 12:03

2 votes

1 answer

350 views

NURBS: Advice for specifying the first derivative at the endpoints of a C2 cubic spline interpolation.

derivatives interpolation spline

asked May 15, 2018 at 15:50

2 votes

2 answers

1k views

How to make a closed interpolating B-spline smooth at the joining point.

continuity interpolation spline

asked Apr 21, 2017 at 16:12

2 votes

1 answer

926 views

Suppose that $T$ is a normal operator on $V$. Show that $\|T(v+w)\|=10$.

linear-algebra adjoint-operators

asked Nov 11, 2015 at 15:36

2 votes

3 answers

82 views

Is there a solution to $Tx=y$ such that $\|x\|$ is minimal?

linear-algebra optimization normed-spaces

asked Nov 18, 2015 at 12:44

2 votes

2 answers

337 views

Finite dimensional vector space.

linear-algebra vector-spaces

asked Sep 6, 2015 at 19:31

2 votes

1 answer

3k views

If A is a Lebesgue measurable set then there exists open set G and closed set F with $F\subset A\subset G$ and the measure of G-F is less than epsilon

measure-theory lebesgue-measure

asked Sep 8, 2015 at 14:37

2 votes

1 answer

156 views

Mixture of mixtures.

linear-algebra applications

asked May 12, 2015 at 15:46

2 votes

0 answers

216 views

Show that $T$ is a sufficient statistic.

probability statistics

asked Nov 8, 2014 at 15:45

2 votes

2 answers

7k views

Path integral of ${1\over z^{2}}$ around a circle

integration complex-analysis

asked Apr 3, 2015 at 19:05

2 votes

1 answer

534 views

Find the Laurent expansion for $f(z)=\frac{\exp{1/z^2}}{z-1}$ about $z=0$.

sequences-and-series complex-analysis power-series laurent-series

asked Apr 9, 2015 at 0:11

1 vote

1 answer

300 views

Evaluate integral using Residue Theorem

integration complex-analysis

asked Apr 16, 2015 at 17:12

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76 Questions

Distribution of the difference of two normal random variables.

Law of Cosines: Proof Without Words

Prove an inequality using the Cauchy -Schwarz Inequality [duplicate]

Does pointwise convergence imply that a subsequence converges in measure?

Is this statement meaningful if one of the elements is undefined?

Sequence proof (by induction, presumably) giving me trouble. [duplicate]

Proof that if $Z$ is standard normal, then $Z^2$ is distributed Chi-Square (1).

Prove an equality ($L^P$ spaces)

Verifying the period of $f(x)=\sin(x)+\cos(x/2)$

Find the Laurent Expansion of $f(z)$

Show that $z^n+nz-1$ has $n$ zeros in $D(0,R)$

When will $\operatorname{det}\left(A\cdot A^{\top}\right)=0$?

What kind of a function is $y=2^{\frac{1}{x}}$?

Bayesian posterior variance

Show that there is $z_0$ on the unit circle such that $|p(z_0)|>1$. [duplicate]

Confused about this definition of limit superior.

Find the median of a function of a normal random variable.

Find $E[S]$ where $S$ is the standard deviation of a random sample from a $N(\mu,\sigma^2)$ population.

Is this example of diagonalizable matrix in error?

NURBS: Advice for specifying the first derivative at the endpoints of a C2 cubic spline interpolation.

How to make a closed interpolating B-spline smooth at the joining point.

Suppose that $T$ is a normal operator on $V$. Show that $\|T(v+w)\|=10$.

Is there a solution to $Tx=y$ such that $\|x\|$ is minimal?

Finite dimensional vector space.

If A is a Lebesgue measurable set then there exists open set G and closed set F with $F\subset A\subset G$ and the measure of G-F is less than epsilon

Mixture of mixtures.

Show that $T$ is a sufficient statistic.

Path integral of ${1\over z^{2}}$ around a circle

Find the Laurent expansion for $f(z)=\frac{\exp{1/z^2}}{z-1}$ about $z=0$.

Evaluate integral using Residue Theorem