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user65452
  • Member for 8 years, 11 months
  • Last seen more than a week ago
7 votes
3 answers
13k views

Confusion in rotation matrix - rotation about $y$ axis

6 votes
4 answers
208 views

How to integrate$ I=\int\ln\left(\frac{L}{2}+\sqrt{\frac{L^2}{4}+y^2+z^2}\right)\ \mathrm dy $

3 votes
4 answers
2k views

Difference between real and complex calculus?

3 votes
2 answers
7k views

Transformation of fourth rank tensor and its matrix form

2 votes
2 answers
195 views

Cauchy integral formula and contour

2 votes
0 answers
340 views

Solution of partial differential equation - modified heat equation

1 vote
2 answers
157 views

Calculating periodicity of general function

1 vote
0 answers
24 views

Boolean function with characters in the function value, not 0 and 1

1 vote
2 answers
124 views

Solution of second order ODE $y''+(ax+b)y'+cy=0$.

0 votes
1 answer
41 views

$\partial y/\partial t=y''+(ax+b)y'+cy$ - Separation of variables

0 votes
2 answers
198 views

analytic solution of partial differential equation

0 votes
1 answer
328 views

How to solve nonlinear partial differential equation with two variables

0 votes
1 answer
53 views

what's $\frac{\partial}{\partial f}\frac{\partial}{\partial x}\left(a(x)\frac{\partial f}{\partial x}\right)$

0 votes
0 answers
84 views

Frechet Derivative of operator

0 votes
2 answers
198 views

Solution of $y''+y^2=0$?