1
vote
1answer
109 views

inverse Laplace transfor by using maple or matlab

I want to use inverse Laplace transform to F function by using maple or matlab. However I cannot get any answer. I know the answer from table but I want to use one of softwares. from table: ...
0
votes
1answer
76 views

Graphing a triple integral, software and the actual integral

What software can be used to graph a triple integral? I tried to use wolfram alpha, but it wouldn't work. I am trying to graph:$ \int_0^1 \int_\sqrt{z}^1 \int_0^{2-y-z} f(x,y,z) \; \mathrm{dx\; dy\; ...
4
votes
1answer
411 views

Integral with Dirac delta (me or wolfram mathematica?)

I tried to compute with Wolfram Mathematica the following integral $$I=\int_0^\pi\int_{-\infty}^\infty x e^{-jx\cos(\theta-\varphi)}f(\alpha\cos(\theta-\psi))\mathrm \, dx\mathrm \, d\theta$$ where ...
2
votes
0answers
107 views

computing a difficult integral using software

I'd like to compute the following integral. I've tried SAGE but it just runs for 15 minutes then stops.. not sure what that means. If anyone wants to take a crack with mathematica or anything, please ...
0
votes
1answer
384 views

How did Wolframalpha calculate this integral?

I tried it on Maple and Mathematica, but neither is giving me an answer to this integral $$\int_0^{\infty } \frac{\sqrt{\left(u^2+1\right) \left(u^6+4 u^4-4 u^3-4 u+4\right)}}{\left(u^3+1\right)^2} ...
2
votes
0answers
133 views

Numerical Integration

For $r=1$, how to calculate the following integral numerically. $$\frac{8}{\sqrt{3}r^2}\int_{x=0}^{\frac{r}{2}}\int_{y=0}^{\sqrt{3}(\frac{r}{2}-x)}\prod_{i=0}^2\left(1-\frac{2}{\pi} \cos^{-1} ...
0
votes
3answers
505 views

Draw 3d double integral in Maple

I have a voluntary hand in I am working on, and in that rigard I need to draw the following figure in Maple. The area $ \displaystyle \iint_R \frac{x}{\sqrt{x^2+y^2}} \mathrm{d}A $ where $R$ is ...
1
vote
2answers
478 views

Correct integration formula

I'm the author of application for android called Calculator++ One of the users submitted a bug in the integration of trigonometric functions. And I'm absolutely disagree with him. In my app I use ...
1
vote
2answers
241 views

Numerical solution of the Dirichlet problem for unit circle in two dimensions

How to approach the problem using integral equations and solve it with numerical methods in matlab? Are there any tutorials with code for begginers?
0
votes
1answer
195 views

Equation to find if a set of vertices form a concave shape?

i'm trying to get around the rule of only being able to form concave shapes in the SFML c++ library by forming the non-concave shape out of many concave shapes. What I don't know is the equation for ...
2
votes
1answer
529 views

How to approach a symbolic integral that Mathematica cannot solve?

I'm aware that there are an infinite number of integrals that do not have a closed-form solution. But how does one know if their particular integral is one of these? For example, a particular integral ...
2
votes
2answers
1k views

Wolfram Alpha: How to show functions with abs() and sgn() as a piecewise function?

I was trying to obtain this result: integrate e^|x| dx The result is $$ \int e^{|x|} dx = \frac12 e^{-x} \left( (e^x-1)^2 \operatorname{sgn}(x) -2e^x +e^{2x} - ...