User MinYoung Kim

22 votes

4 answers

3k views

Is showing that $x_n \rightarrow x_0\Rightarrow f(x_n) \rightarrow f(x_0)$ for a single sequence enough to prove continuity?

asked May 27, 2019 at 0:45

12 votes

3 answers

2k views

How to learn without looking at solutions? (real analysis)

asked Oct 6, 2019 at 0:44

4 votes

1 answer

1k views

CNOT quantum gate using tensor products

asked Feb 12, 2019 at 8:22

3 votes

3 answers

979 views

Using Laplace transform to solve differential equation $y'' -4y' = -4te^{2t}$

asked Feb 7, 2019 at 1:54

3 votes

1 answer

69 views

Is the textbook solution wrong by a sign? Laurent Series

asked Jan 23, 2019 at 5:52

2 votes

1 answer

101 views

Expanding Laurent Series with $(z-1)$ term on numerator

asked Jan 22, 2019 at 5:22

2 votes

1 answer

133 views

Find order of pole $\frac{e^z -1}{z^2 +4}$, about $z=2i$.

asked Jan 22, 2019 at 6:34

2 votes

1 answer

103 views

Need serious help with notation representing matrices as "scalars"

asked Jan 29, 2019 at 5:19

2 votes

1 answer

14 views

Rewrite $x \notin A$ using negation proper way?

asked Sep 28, 2019 at 22:04

2 votes

2 answers

623 views

Expected value of function of Poisson random variable (SOA Exam P)

asked Feb 4, 2020 at 9:56

2 votes

1 answer

57 views

Two independent random geometric variables

asked Mar 1, 2020 at 10:22

2 votes

2 answers

735 views

Conditional variance given $X>3$, $Y>3$

asked Mar 13, 2020 at 3:33

2 votes

2 answers

187 views

Eigenvalues of arbitrary $2×2$ matrix?

asked May 11, 2020 at 4:04

1 vote

1 answer

111 views

Two investments and accumulation function

asked Jul 2, 2020 at 10:19

1 vote

1 answer

98 views

Show that distribution of function of LRT statistic for normal mean hypothesis testing is normally distributed

asked Mar 13, 2020 at 8:38

1 vote

1 answer

106 views

Assumptions in converting between nominal/effective interest/discount

asked Jul 15, 2020 at 21:23

1 vote

1 answer

890 views

Linear interpolation and annuities problem

asked Jul 26, 2020 at 10:25

1 vote

1 answer

399 views

Solving for unknown number of payments in drop payment annuity

asked Jul 30, 2020 at 23:29

1 vote

1 answer

536 views

Discounting and Interest

asked Jul 15, 2020 at 2:14

1 vote

1 answer

332 views

Geometrically varying annuity payable less frequently than interest is convertible

asked Aug 14, 2020 at 0:16

1 vote

1 answer

231 views

Yield rate as a nominal interest rate

asked Aug 20, 2020 at 5:34

1 vote

1 answer

454 views

Calculte expected value of uniform joint density

asked Mar 7, 2020 at 10:26

1 vote

2 answers

95 views

Conditional expectation of exponential RV with condition on itself

asked Mar 10, 2020 at 8:08

1 vote

1 answer

232 views

Conditioning on expectation?

asked Mar 11, 2020 at 1:55

1 vote

1 answer

322 views

Conditional expectation based on uniform RV

asked Mar 11, 2020 at 4:02

1 vote

2 answers

122 views

Conditional variance given condition on both random variables

asked Mar 13, 2020 at 3:29

1 vote

1 answer

217 views

GLRT statistic for composite normal hypothesis, two unknowns

asked Feb 20, 2020 at 9:46

1 vote

2 answers

65 views

Determine if $f_n(x) = \frac{x}{n^2}$ converges uniformly on $[0,\infty)$

asked Oct 3, 2019 at 23:16

1 vote

2 answers

141 views

Calculating chance of all heads in 5 toin cosses without multiplication?

asked Sep 27, 2019 at 2:16

1 vote

1 answer

37 views

Prove function is continuous given LHS and RHD limits converge to same value.

asked Oct 5, 2019 at 4:30

Stack Exchange Network

81 Questions

Is showing that $x_n \rightarrow x_0\Rightarrow f(x_n) \rightarrow f(x_0)$ for a single sequence enough to prove continuity?

How to learn without looking at solutions? (real analysis)

CNOT quantum gate using tensor products

Using Laplace transform to solve differential equation $y'' -4y' = -4te^{2t}$

Is the textbook solution wrong by a sign? Laurent Series

Expanding Laurent Series with $(z-1)$ term on numerator

Find order of pole $\frac{e^z -1}{z^2 +4}$, about $z=2i$.

Need serious help with notation representing matrices as "scalars"

Rewrite $x \notin A$ using negation proper way?

Expected value of function of Poisson random variable (SOA Exam P)

Two independent random geometric variables

Conditional variance given $X>3$, $Y>3$

Eigenvalues of arbitrary $2×2$ matrix?

Two investments and accumulation function

Show that distribution of function of LRT statistic for normal mean hypothesis testing is normally distributed

Assumptions in converting between nominal/effective interest/discount

Linear interpolation and annuities problem

Solving for unknown number of payments in drop payment annuity

Discounting and Interest

Geometrically varying annuity payable less frequently than interest is convertible

Yield rate as a nominal interest rate

Calculte expected value of uniform joint density

Conditional expectation of exponential RV with condition on itself

Conditioning on expectation?

Conditional expectation based on uniform RV

Conditional variance given condition on both random variables

GLRT statistic for composite normal hypothesis, two unknowns

Determine if $f_n(x) = \frac{x}{n^2}$ converges uniformly on $[0,\infty)$

Calculating chance of all heads in 5 toin cosses without multiplication?

Prove function is continuous given LHS and RHD limits converge to same value.