User Nyquist-er - Mathematics Stack Exchange

4 votes

2 answers

147 views

Proving that a complicated complex expotential is periodic or not.

asked Dec 4, 2023 at 16:12

3 votes

0 answers

107 views

What does it mean for a matrix $A$ to have only real eigenvalues?

asked Jul 13, 2022 at 0:28

2 votes

2 answers

60 views

How to prove that $P(A) P(B)=P(A \cap B) P(A \cup B)+P\left(A \cap B^{\prime}\right) P\left(B \cap A^{\prime}\right)$

asked Oct 17, 2023 at 10:47

1 vote

2 answers

110 views

Proving that the norm $n \|A\|_{l_\infty}$ is a matrix norm.

asked May 16, 2023 at 15:20

1 vote

1 answer

73 views

When a function $f$ is strictly increasing

asked Jun 16, 2023 at 9:45

1 vote

1 answer

65 views

Does there exist a structuring element B such that $X \oplus B \supseteq X \ominus B$ isn't true?

asked Sep 25, 2022 at 14:13

1 vote

1 answer

314 views

Chain rule for vector by vector derivative

asked Jun 28, 2023 at 22:34

0 votes

1 answer

182 views

Does every non-square matrix have both a left inverse and a right inverse matrix?

asked Sep 30, 2022 at 15:39

0 votes

1 answer

79 views

On the derivative of $\mathbf{A}\mathbf{x}$ w.r.t the vector $\mathbf{x}$, where $\mathbf{A}$ is a matrix, but without using entry-wise derivatives.

asked Jan 28, 2023 at 13:42

0 votes

1 answer

55 views

Gradient of $ \left( \mathbf{w}^T \mathbf{x} \right)^2 - 2\mathbf{w}^T \mathbf{x}$ w.r.t $\mathbf{w}$

asked Jan 31, 2023 at 21:41

0 votes

1 answer

39 views

Determining the change of Error when changing the step size $h$ of the Taylor Method for IVPs

asked Jun 17, 2023 at 19:35

0 votes

2 answers

84 views

Number of all possible different combinations of a non-standard card deck.

asked Oct 30, 2023 at 12:55

Stack Exchange Network

12 Questions

Proving that a complicated complex expotential is periodic or not.

What does it mean for a matrix $A$ to have only real eigenvalues?

How to prove that $P(A) P(B)=P(A \cap B) P(A \cup B)+P\left(A \cap B^{\prime}\right) P\left(B \cap A^{\prime}\right)$

Proving that the norm $n \|A\|_{l_\infty}$ is a matrix norm.

When a function $f$ is strictly increasing

Does there exist a structuring element B such that $X \oplus B \supseteq X \ominus B$ isn't true?

Chain rule for vector by vector derivative

Does every non-square matrix have both a left inverse and a right inverse matrix?

On the derivative of $\mathbf{A}\mathbf{x}$ w.r.t the vector $\mathbf{x}$, where $\mathbf{A}$ is a matrix, but without using entry-wise derivatives.

Gradient of $ \left( \mathbf{w}^T \mathbf{x} \right)^2 - 2\mathbf{w}^T \mathbf{x}$ w.r.t $\mathbf{w}$

Determining the change of Error when changing the step size $h$ of the Taylor Method for IVPs

Number of all possible different combinations of a non-standard card deck.