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Andrew's user avatar
Andrew's user avatar
Andrew
  • Member for 8 years, 3 months
  • Last seen more than a week ago
8 votes

What is the connection between the invertibility of a matrix the kernel of the matrix

2 votes
Accepted

The perimeter is equal to the area, i.e. $2a+2b=ab$.

2 votes
Accepted

Why does $\vec{r}\,'(t)$ give the tangent vector to $\vec{r}(t)$ if $\vec{r}\,'(t)$ is orthogonal to $\vec{r}(t)$

2 votes

What are path and contour integrals?

1 vote

Problem in deriving an ordinary differential equation from a trigonometric equation

1 vote

Combinatorial rule for a stable stack of bricks.

1 vote
Accepted

Why is Perturbation Theory named "a theory"?

0 votes

Prove that $\lim_{n\to \infty} (a_1a_2\ldots a_n)^{\frac 1n} = L$ given that $\lim_{n\to \infty} (a_n) = L$

0 votes

What can we do to make the minimum value more noticeable?

0 votes

Roots of nonlinear equation

0 votes

How to estimate condition number based on SVD of submatrix?

0 votes

Approximation of $\frac{f(x_0+h)+f(x_0-h)}{2}-f(x_0)$ for $h\rightarrow 0$

0 votes

Distribution of right jumps conditional of hitting time for a random walk with possibility of inaction.

0 votes
Accepted

Given two concurrent lines $(x,y,z)$ with a missing coordinate on the x axis , how do I find the intersection point between them?