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age 25
visits member for 3 years, 5 months
seen 22 hours ago

If you solve this I'd award you with 500rep


1d
revised Finding characteristic equation of problem and solve recurrence relation
deleted 12 characters in body
Aug
12
revised If $AB = I$ then $BA = I$
Tuning this into a correct argument.
Aug
8
revised How prove that $\max(|f(1)|,|f(2)|,|f(3)|,|f(4)|)\geq \frac{1}{2}$ if $f(x) = \cos(Ax)+\cos(Bx)$?
edited title
Aug
6
revised Proof for '$AB = I$ then $BA = I$' without Motivation?
Formatting.
Aug
6
revised Show that a finite group with certain automorphism is abelian
english
Aug
5
revised Trouble understanding solution to abstract algebra problem
Typo, formatting.
Aug
5
revised Prove that the polynomial $q$ exists.
Formatting.
Jul
31
revised Let $T:V\to W$ be a linear transformation. If $\dim V> \dim W$ then $T$ is not injective. True or false?
edited title
Jul
24
revised Evaluate the limit: $\lim_{x\to \infty}$
formatting
Jul
22
revised Is the Axiom of Choice necessary to prove $\mathbb R \approx \mathcal P(\omega)$?
added 9 characters in body
Jul
21
revised If $AB = I$ then $BA = I$
added 2 characters in body
Jul
14
revised How does one prove that if $f$ and $g$ are linear functionals on $V$ such that $h=fg$ is also a linear functional, then either $f=0$ or $g=0?$
Formatting
Jul
12
revised Existence of rational sequence such that a polynomial is split over $\Bbb{Q}$
Avoiding trivial solutions
Jul
10
revised The annihilator of an intersection
Formatting, english
Jul
6
revised Nilpotent Matrix
Fixed typo
Jul
6
revised If matrix $A$ is invertible, then there is a permutation of its rows leaving no-zeros on the diagonal
Formatting
Jul
1
revised Proof that $a\equiv b \pmod n \iff a \pmod n = b\pmod n$
Formatting
Jun
30
revised Calculate the dimension of $U = \{(x_1,x_2,x_3,x_4,x_5) : x_1+x_3+x_5=x_2+x_4=0\}$
TeX
Jun
29
revised $V = \operatorname{Im} T + \ker T $ then $ \operatorname{Im} T \cap \ker T = \{0\}$
Formatting et al
Jun
24
revised Proof for Integral Inequality $|\int f| \le \int |f|$ - is it sufficient enough?
added 30 characters in body