User Coco Jambo

15 votes

8 answers

730 views

What are some examples of "visually beautiful" math texts?

asked Dec 1, 2020 at 8:08

6 votes

2 answers

6k views

What is the solution to linear ODE $\dot x = Ax + b$?

asked May 8, 2019 at 21:36

4 votes

2 answers

213 views

Is there a rigorous definition for matrix derivatives?

asked Jan 21, 2021 at 21:23

4 votes

2 answers

107 views

What is the higher dimensional analogy of $x^3, x^4$, etc.?

asked Feb 6, 2021 at 22:47

3 votes

1 answer

55 views

When does a sequence $x(n)$ actually achieve the value at the limit?

asked Sep 25, 2021 at 4:00

3 votes

1 answer

263 views

How do you mathematically characterize an "enlarged probability simplex"?

asked May 19, 2020 at 0:49

3 votes

1 answer

194 views

Understanding definition of random variable in textbook "Basic Stochastic Processes"

asked May 25, 2019 at 2:51

2 votes

1 answer

2k views

How to choose the constant of strong convexity?

asked Aug 20, 2020 at 20:56

2 votes

1 answer

64 views

How to show $y_k = \sum\limits_{i = 0}^{k-1} e^{-y_i}$ diverges as $k \to \infty$

asked Mar 5, 2018 at 4:09

1 vote

1 answer

895 views

What does this monotonicity condition on the gradient correspond to?

asked May 10, 2019 at 4:04

1 vote

1 answer

72 views

How to show $f(x) = f(y) + \int\limits_0^1 \nabla f(y + t(x-y))^T(x-y)dt$?

asked Feb 17, 2018 at 22:40

1 vote

1 answer

98 views

Show $f(x) = \frac{1}{2} x_1^2 + \frac{1}{2} x_2^2 - \log(1 + x_1 + x_2)$ is strongly convex and find its parameter.

asked Aug 25, 2020 at 1:34

1 vote

0 answers

29 views

How to formulate the probability of "selecting/applying functions to a number" in terms of random variables?

asked Sep 4, 2020 at 20:35

1 vote

2 answers

135 views

What is the set $\mathbb{Z}\backslash 2 \mathbb{Z}$?

asked Nov 20, 2021 at 20:06

0 votes

1 answer

86 views

How to determine the summability of decaying exponential times harmonic series?

asked Mar 19, 2022 at 1:46

0 votes

1 answer

44 views

How to show the equivalence between full row rank of $A$ and the column space of $A$ being equal to $\mathbb{R}^m$?

asked May 15, 2020 at 22:19

0 votes

1 answer

247 views

Where does the Euler Mascheroni constant come from in the formula $\sum_{n≤x} 1/n= \log(x)+\gamma +O(1/x)$

asked Mar 21, 2022 at 21:24

0 votes

1 answer

39 views

Does anyone know how to bound decaying exponential series of the form $\exp(\sum_{k = i + 1}^n-C/(k+1))$

asked Mar 22, 2022 at 19:18

0 votes

0 answers

40 views

How to do comparison test when the numerator is a polynomial?

asked Mar 23, 2022 at 5:15

0 votes

1 answer

27 views

Question about conditioning on sequences of random variables, where the sequence is related by a function $f$

asked Oct 8, 2020 at 18:35

0 votes

1 answer

48 views

Reference request: "continuity at a point"?

asked Oct 14, 2021 at 17:58

0 votes

1 answer

68 views

Which algorithm considered to be the accelerated version of stochastic gradient descent?

asked Feb 17, 2018 at 20:54

0 votes

1 answer

495 views

How to explain the dual constraints for the non-convex QP example?

asked Mar 23, 2018 at 2:25

0 votes

1 answer

3k views

What is the geometric multiplicity of the zero eigenvalue of the zero matrix?

asked Apr 8, 2018 at 23:41

0 votes

1 answer

378 views

Why do we update step-size for constant step-size FISTA?

asked Apr 14, 2018 at 23:40

0 votes

1 answer

182 views

Prove the following claim about skew symmetric matrix $\langle x,Ax\rangle =0$

asked May 8, 2019 at 20:41

-1 votes

1 answer

79 views

Is $\sum_{i =1}^\infty (i - 1)$ summable?

asked Mar 21, 2022 at 7:00

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27 Questions

What are some examples of "visually beautiful" math texts?

What is the solution to linear ODE $\dot x = Ax + b$?

Is there a rigorous definition for matrix derivatives?

What is the higher dimensional analogy of $x^3, x^4$, etc.?

When does a sequence $x(n)$ actually achieve the value at the limit?

How do you mathematically characterize an "enlarged probability simplex"?

Understanding definition of random variable in textbook "Basic Stochastic Processes"

How to choose the constant of strong convexity?

How to show $y_k = \sum\limits_{i = 0}^{k-1} e^{-y_i}$ diverges as $k \to \infty$

What does this monotonicity condition on the gradient correspond to?

How to show $f(x) = f(y) + \int\limits_0^1 \nabla f(y + t(x-y))^T(x-y)dt$?

Show $f(x) = \frac{1}{2} x_1^2 + \frac{1}{2} x_2^2 - \log(1 + x_1 + x_2)$ is strongly convex and find its parameter.

How to formulate the probability of "selecting/applying functions to a number" in terms of random variables?

What is the set $\mathbb{Z}\backslash 2 \mathbb{Z}$?

How to determine the summability of decaying exponential times harmonic series?

How to show the equivalence between full row rank of $A$ and the column space of $A$ being equal to $\mathbb{R}^m$?

Where does the Euler Mascheroni constant come from in the formula $\sum_{n≤x} 1/n= \log(x)+\gamma +O(1/x)$

Does anyone know how to bound decaying exponential series of the form $\exp(\sum_{k = i + 1}^n-C/(k+1))$

How to do comparison test when the numerator is a polynomial?

Question about conditioning on sequences of random variables, where the sequence is related by a function $f$

Reference request: "continuity at a point"?

Which algorithm considered to be the accelerated version of stochastic gradient descent?

How to explain the dual constraints for the non-convex QP example?

What is the geometric multiplicity of the zero eigenvalue of the zero matrix?

Why do we update step-size for constant step-size FISTA?

Prove the following claim about skew symmetric matrix $\langle x,Ax\rangle =0$

Is $\sum_{i =1}^\infty (i - 1)$ summable?