2,871 reputation
416
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location India
age
visits member for 3 years, 2 months
seen Apr 18 at 0:06

Research student


Oct
4
awarded  Yearling
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Oct
4
awarded  Yearling
Jul
19
comment Solve an equation of inner product of a matrix and itself
Assuming $X_{ij}\in\mathbbm{R}$, by singular value decomposition you can have $X=U\Sigma V^t$.
Jul
19
comment Area enclosed by curves $\; y=x^2;\;\;y^2=2x-x^2$
@LeahLewy, Perhaps no need now...please have a look at the answer by amWhy.
Jul
19
comment Area enclosed by curves $\; y=x^2;\;\;y^2=2x-x^2$
The integral are easy to compute: for the first one use $2x-x^2=1-(x-1)^2$ and use the formula for $\int\sqrt{a^2-x^2}dx$.
Jun
8
comment $\{\cos n+\sin n\}$ have a convergent subsequence?
@BrianM.Scott, yes you are correct, it is Bengali, my mother tongue.
Jun
8
comment $\{\cos n+\sin n\}$ have a convergent subsequence?
Should it not be $\sqrt{2}$, instead of 2?
Jun
8
comment Question about inner product.
a simple typo: at the last line, $g$ is odd.
Jun
7
revised find the complex number that satisfies the following conditions
After Edit
Jun
7
comment find the complex number that satisfies the following conditions
And if the second one is also $z.z=84$, then please accept @user81310's answer.
Jun
7
answered find the complex number that satisfies the following conditions
Jun
2
answered How can this be the correct derivative?
May
7
awarded  Caucus
Apr
18
comment Rearranging Matricies
Indeed the set of matrices forms a vector space over $\mathbb{C}$.
Apr
2
comment Need Help with Proof
$S=I_2,T=-I_2$ is a counterexample.
Apr
2
answered Find all nonzero values of $k$ such that the vectors $(-11; k; 2)$ and $(k; k^2; k)$ are orthogonal.
Apr
2
comment Find all nonzero values of $k$ such that the vectors $(-11; k; 2)$ and $(k; k^2; k)$ are orthogonal.
Is $k2=2 k$....?
Apr
1
comment In Search of a More Elegant Solution
...unless there are some additional constraint on $x,y,z$, like $x^2+y^2+z^2\le 1$ etc.