Skip to main content
Dr. Sundar's user avatar
Dr. Sundar's user avatar
Dr. Sundar's user avatar
Dr. Sundar
  • Member for 2 years, 2 months
  • Last seen more than a month ago
  • Chennai, India
5 votes
Accepted

Why are repeated poles at the origin regarded as unstable?

5 votes
Accepted

Is the following an Initial Value Problem or not?

4 votes

Why is the range a larger set than the domain?

4 votes

Is $\sqrt{x}$ a function?

3 votes
Accepted

Solving Linear Inhomogeneous System of Differential Equations

3 votes
Accepted

Proving two inequalities involving integrals and sums

3 votes

Matrix exponential of non diagonalizable matrix?

2 votes

What is a Dominant Eigenvalue?

2 votes

Proving the Lie-Product formula

2 votes

$\{z\in\mathbb{C} | \operatorname{Re}(z)=\operatorname{Im}(z)\}$ open set

2 votes
Accepted

Simplifying dy/(y+z) = dz/(y-z) for integration

2 votes
Accepted

Solving the Euler Lagrange equation for the functional $L(y)=\int_{-1}^7\sqrt{1+y'^2} dx$

2 votes
Accepted

Prove that $9^{n+1}-8n-9$ is divisible by 64 where n is a natural number using proof by induction.

2 votes

To show: Direct sum of subspaces $M$ and $N$ in $R^2$ equals $R^2$, where $M=\{(x,y)\in R^2|2x+y=0 \}$ and $N=\{(x,y)\in R^2|x-y=0 \}$

2 votes
Accepted

Assume $\boldsymbol 1^\top A \boldsymbol 1 = 1$. Is $A$ invertible?

2 votes

How to find the probability density function of the random variable $\frac{1}{X}$?

2 votes
Accepted

Prove that $m=n$ in the equation $a^{m-n} = 1$ for $a \gt 1$

2 votes
Accepted

Show that $\mathbb{R}$ and the open interval $(-1, 1)$ have the same cardinality.

2 votes
Accepted

Growth of a circular ink blot grows at the rate of $2\text{ cm}^2$ per second

2 votes
Accepted

$\sum_{i=1}^{n}(c_i\log_2 x_i)$ biggest when $x_i = \frac{c_i}{\sum_i c_i}$

2 votes
Accepted

Eigenvalues of the sum of two matrices

2 votes

A problem involving the definition of composite functions and its derivative.

2 votes

Prove $E_2$ is measurable.

2 votes
Accepted

How to prove $\frac{a}{b}=\frac{c-e}{d-f}$ from $\frac{a}{b}=\frac{c}{d}=\frac{e}{f}$?

2 votes

How "Fundamental" is the "Fundamental Theorem of Linear Programming"?

2 votes

Sum of "alternating-like" series

2 votes

Solving $\overline {(z+1+5i)}= 3z+9−9i$

2 votes
Accepted

Calculating area trapped between $g(x)=\frac{8x}{\pi}+\frac{\sqrt{2}}{2}-1$ and $f(x)=\sin(2x) $

2 votes

How do I find x(t) and y(t) at the particle given dy/dt and dx/dt?

2 votes

How do I handle equations like $f(x)-x = f'(x)$?

1
2 3 4 5 6