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Top Questions

-3 votes
1 answer
28 views

Why does $\sqrt{2x-10} = -5$ have no solutions if $\sqrt{4} = \pm 2$?

-1 votes
0 answers
24 views

Series with trigonometric functions

2 votes
0 answers
20 views

Why this partial function is not computable?

1 vote
0 answers
16 views

Is there a nontrivial LOTS that is connected and totally path disconnected?

1 vote
0 answers
16 views

Calculate values of Möbius function

0 votes
0 answers
12 views

Looking for a metric, norm and inner product (on a subset of) $(\mathbb{R}^n)^{\mathbb{N}^k}$

1 vote
1 answer
22 views

To find degree of following differential equation $(y^")^{1/2}=(y^")^5$.

5 votes
0 answers
44 views

Is there any hope to prove that the $f(x)=g(x)$ has no solution on the domains where both $f(x),g(x)$ are negative?

1 vote
1 answer
41 views

Expected value of $X^{-}$.

-3 votes
0 answers
34 views

What is the number of positive integer solution for the equation $x_1 + 2x_2 + 3x_3 + ..... +nx_n=n$? [closed]

0 votes
1 answer
25 views

Does $\left| \int_a^b f dx \right| \le C$ for all $a$ and $b$ imply $f \in L^1(\mathbb{R}; dx)$?

0 votes
0 answers
32 views

What do you call it when, in the limit, two functions are proportional by a factor of 1?

0 votes
0 answers
26 views

Complex Integral $\int^\pi_0 x\cdot \overline{\sin(nx)}dx$

1 vote
1 answer
20 views

Analytic $f$ is real on $\partial U$ implies $f$ being constant with $U = \{|z| < 1\}$ [duplicate]

0 votes
1 answer
18 views

Let $X$ be a random variable following the standard cauchy distribution. Show that $E[X^{\alpha}]$ exists, $\forall\alpha\in(0,1)$

2 votes
0 answers
23 views

Taking the partial derivative of both sides of an equation

1 vote
0 answers
23 views

If $A$ is a ring, why isn’t the ideal $A^{(\mathbb{N})}\subset A^\mathbb{N}$ finitely generated?

0 votes
1 answer
21 views

If $|28 - x^2| < |3x|$ ,then what is the product of all possible integer values of $x$?

0 votes
0 answers
20 views

Did I get this induction exercise on the natural numbers set-theory right?

0 votes
1 answer
11 views

Stopped version of UI martingale is UI

1 vote
1 answer
14 views

Surjective étale morphism between normal schemes

1 vote
0 answers
13 views

For a representation $(V, p_V)$ by a finite group and $W = \bigoplus \limits_{i = 1}^{n} V$ calculate $\dim(\text{Hom}_G(V,W))$

7 votes
4 answers
156 views

How to evaluate $\int^{\infty}_0 \frac{x^{1010}}{(1 + x)^{2022}} dx$?

0 votes
2 answers
46 views

At What Points on the Curve $y-x^3=0$ does the normal line have a slope of $\frac{-1}{3}$?

1 vote
1 answer
45 views

Should I reject the null hypothesis or not?

-1 votes
0 answers
39 views

Bertrand's Ballot Theorem

0 votes
1 answer
29 views

Definition of Topology In Terms of Interior Operator

1 vote
0 answers
29 views

Finding the kernel of a given map

0 votes
0 answers
27 views

Prove for $\|\left[\begin{array}{cc} A&0\\ 0&B \end{array} \right]\|\leq \max\{\|A\|,\|B\|\}$

0 votes
2 answers
22 views

Doing transformations on trignometric functions

0 votes
0 answers
16 views

Is this shorter attempt on the existence of the maximizer in Kantorovich duality is correct?

0 votes
2 answers
14 views

Can an articulation point have all edges as non-bridge?

1 vote
0 answers
13 views

structural constraints imposed by associativity on group multiplication table

1 vote
0 answers
13 views

The covariance between the sum of N independent random variables and N.

0 votes
1 answer
13 views

Determine the location of a logistics center which is optimally close to its providers

0 votes
0 answers
12 views

$\int_C K_g(s)ds+\iint_EKdA=???$

2 votes
0 answers
47 views

Does a set of all decimal expansions of $\pi$ contains $\pi?$ [duplicate]

0 votes
1 answer
27 views

Homotopy equivalent to $\mathbb{S}^1$, but not homeomorphic to $\mathbb{R} \times \mathbb{S}^1$

4 votes
1 answer
126 views

Why an LTI system with some zero eigenvalues still stable?

0 votes
1 answer
32 views

Using geometry to prove that $\tan(\alpha)=\frac{\sin(\alpha)}{\cos(\alpha)},\sec(\alpha)=\frac{1}{\cos(\alpha)},...$

1 vote
0 answers
31 views

Find the value of $\int_{1}^{4}\int_{\max\{\frac{1}{y},\frac{y}{2}\}}^{\min\{\frac{8}{y},{y}\}} \frac{y}{x}\sin(\frac{y}{x}+xy)dxdy$

0 votes
0 answers
30 views

The win rate of three player rotation battle

0 votes
0 answers
30 views

Doubts on asymptotic criterion for $\sum_{n=1}^{\infty}a_n=\sum_{n=1}^{\infty}n^{a}\tan^{-1}\bigg(\frac{1}{n^a}\bigg)-e^{1/n}$ with $a>0$.

0 votes
2 answers
23 views

Convergence of the following improper integral

0 votes
0 answers
25 views

Total orthonormal set which is not a basis

0 votes
0 answers
18 views

Express a normal linear transformation as a linear combination of projections.

0 votes
2 answers
28 views

Intuition behind enveloping functions


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