User Varazda

12 votes

How do you derive a normal vector from the equation of a line?

answered Jan 8, 2018 at 4:30

9 votes

Accepted

Derivative of arcsin

answered Jan 22, 2017 at 21:38

6 votes

Accepted

How can I get the limit of this problem

answered Nov 7, 2018 at 14:03

4 votes

How to determine the period of composite functions?

answered Nov 13, 2018 at 17:42

4 votes

Accepted

A definite integral of $(\log(x))^2 x^{3/2}$

answered Jan 26, 2017 at 19:36

3 votes

Accepted

Explanation for congruences equality

answered Dec 23, 2017 at 18:08

2 votes

Improper integrals with parameter

answered Jan 28, 2017 at 14:08

2 votes

Accepted

Non linear first order ODE, not exact and not separable

answered Dec 27, 2017 at 21:09

2 votes

How to solve this limit when direct substitution fails. Why do this work?

answered Jan 5, 2018 at 19:11

2 votes

Accepted

prove $\|v \|_{L^2} + \|v' \|_{L^2} \leq 2\|v \|_{H^1}$

answered Jan 5, 2018 at 21:54

2 votes

Accepted

weak solution is classical solution

answered Jan 10, 2018 at 16:30

2 votes

Solving a limit of $\frac{\ln(x)}{x-1}$ with taylor expansion

answered Jan 14, 2018 at 13:47

2 votes

Partial derivative of nabla operation

answered Oct 30, 2018 at 13:01

2 votes

How Isolate y from $a=\sqrt{(y^2+(a+x)^2)^3}$

answered Nov 1, 2018 at 11:11

2 votes

Accepted

Big O and equality

answered Jan 21, 2017 at 23:18

2 votes

Upper bound for the norm of convolutions: $\Vert f_1\ast\cdots\ast f_N\Vert_r\leq\Vert f_1\Vert_{p_1}\cdots\Vert f_N\Vert_{p_N}$

answered Jan 22, 2017 at 0:35

1 vote

Accepted

A practical method to determine if $f \in L^p(\mathbb{R})$

answered Jan 25, 2017 at 13:04

1 vote

Integral of floor function

answered Jan 25, 2017 at 13:17

1 vote

Accepted

Can you show me how to derive the following function?

answered Jan 23, 2017 at 13:14

1 vote

Accepted

Prove that convolution in linear time invariant systems is commutative

answered Jan 23, 2017 at 13:29

1 vote

Local maximum and global maximum of $\sin$

answered Jan 24, 2017 at 20:10

1 vote

Accepted

Application of Tonelli

answered Jan 23, 2017 at 14:42

1 vote

Accepted

Prove $\|v\|_{H^1(\Omega )}\leq C(\|f\|_{L^2(\Omega )}+\|v\|_{H^{1/2}(\partial \Omega )}+\|\partial _\nu v\|_{H^{-1/2}(\partial \Omega )})$

answered Jan 23, 2017 at 16:03

1 vote

Finding a strict Liapunov function

answered Jan 23, 2017 at 22:41

1 vote

Differential equation / Separable

answered Jan 24, 2017 at 18:32

1 vote

I want to find the limit of a specific function

answered Nov 1, 2018 at 11:33

1 vote

Understand $\delta $ function, why do me write $\int \delta (x)dx$ instead of $\int d\delta $ ? Since $\int \delta (x)dx$ should be $0$

answered Nov 1, 2018 at 13:52

1 vote

$i^{1/n}$ when $n \to \infty$

answered Oct 27, 2018 at 16:50

1 vote

Accepted

Solution of continuity equation

answered Dec 25, 2017 at 17:39

1 vote

Accepted

Shift sign $y=\frac x{|x|}$ function horizontally

answered Nov 22, 2018 at 17:43

Stack Exchange Network

46 Answers

How do you derive a normal vector from the equation of a line?

Derivative of arcsin

How can I get the limit of this problem

How to determine the period of composite functions?

A definite integral of $(\log(x))^2 x^{3/2}$

Explanation for congruences equality

Improper integrals with parameter

Non linear first order ODE, not exact and not separable

How to solve this limit when direct substitution fails. Why do this work?

prove $\|v \|_{L^2} + \|v' \|_{L^2} \leq 2\|v \|_{H^1}$

weak solution is classical solution

Solving a limit of $\frac{\ln(x)}{x-1}$ with taylor expansion

Partial derivative of nabla operation

How Isolate y from $a=\sqrt{(y^2+(a+x)^2)^3}$

Big O and equality

Upper bound for the norm of convolutions: $\Vert f_1\ast\cdots\ast f_N\Vert_r\leq\Vert f_1\Vert_{p_1}\cdots\Vert f_N\Vert_{p_N}$

A practical method to determine if $f \in L^p(\mathbb{R})$

Integral of floor function

Can you show me how to derive the following function?

Prove that convolution in linear time invariant systems is commutative

Local maximum and global maximum of $\sin$

Application of Tonelli

Prove $\|v\|_{H^1(\Omega )}\leq C(\|f\|_{L^2(\Omega )}+\|v\|_{H^{1/2}(\partial \Omega )}+\|\partial _\nu v\|_{H^{-1/2}(\partial \Omega )})$

Finding a strict Liapunov function

Differential equation / Separable

I want to find the limit of a specific function

Understand $\delta $ function, why do me write $\int \delta (x)dx$ instead of $\int d\delta $ ? Since $\int \delta (x)dx$ should be $0$

$i^{1/n}$ when $n \to \infty$

Solution of continuity equation

Shift sign $y=\frac x{|x|}$ function horizontally