# All Questions

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61 views

### Plotting mass spectrum of states

How can I obtain the following plot via Mathematica? I have my own data but I couldn't have obtained the plot. Thank you for your help
83 views

### Solve and equation containing $\sinh$ and $\cosh$

I want to know how I can solve this or plot a versus b ? Solve[ Sqrt[a] Cosh[1.2 Log[1.65 Sqrt[1/a]]] == Sqrt[-b] Sinh[1.2 Log[1.65 Sqrt[-(1/b)]]], b] Thanks
270 views

### How do I implement convolution integrals symbolically (not numerically)? [closed]

I'm working to symbolically solve convolution integrals i.e., using symbolic equations and not numerical methods of integration. The general form of the convolution I'm working to solve is as follows: ...
98 views

### Unexpected behaviour of Condition with Cases/MatchQ?

When using the unsorted version of Complement in this question I met the following unexpected result, ...
• 31
57 views

### How do I integrate this piecewise function with Mathematica?

I came across the question of what percent of numbers from 0 to 1 have a logerithm whose floor is even. What I did was I made a piecewise function: ...
103 views

• 345
132 views

### FunctionPeriod for functions defined in a Piecewise manner

To create a minimal example, consider a piecewise function: ...
• 16.2k
119 views

### How to give a property to a list of functions?

For example, I have defined a bunch of binary functions Sum1, Sum2, Prod1, ...
• 123
50 views

### Minimum of a function that depends on several variables

I have a function, $$A=\sum_{m}mx$$ provided $$x=\frac{2(y1+iz)}{2t1-\left|\frac{t2}{iy2}+z\right|}$$ Here $$y1,z,t1,t2,y2$$ all are varying. But $x$ needs to be in the limit of $-1$ and $0$. Is there ...
• 1,163
45 views

### Function aborts when inside manipulate

I have a function that completes without problems, as shown here. VisualizeRx[textimage, "test", 1, 0, 0, "WriteFiles" -> False]; But when ...
• 1,857
104 views

### How to get a membership condition for RegionBoundary using RegionMember

This is my first question on this forum, but by no means my first problem with Mathematica (which I've been using daily for years). Consider ...
58 views

### In an element of a matrix, can I refer in an element to its own row or column? [closed]

In an expression inside the matrix, can I obtain the indices of the element where this expression is located? Also, can I refer to other elements of that same matrix, like in spreadsheets?
• 2,751
117 views

### How to solve 2D Heat equation on rectangle with NDSolve?

I am trying to solve the 2D heat equation $$\Delta u =u_t$$ with Dirichlet boundary conditions on the rectangle $(0,a)\times (0,b)$ and with initial condition $u(x,y,0)=g(x,y)$. This is my code ...
• 125
267 views

### Linear ODEs with NDSolve

I am trying to solve some first order linear odes. My code is below: ...
105 views

### Heat Equation with Mobile Boundary

I am trying to use NDSolve to find the solution to a set of coupled diffEQs. They represent 1d (radial) heat balance in a spherical shell. The goal is to specify a heat flux into the base of the shell,...
• 123
293 views

### Why do I get a different answer from Mathematica when calculating this integral?

I am curious and confused about the solution of this integral. $$\int_{t}^{T}(1-e^{\alpha(s-T)})e^{\alpha(t-s)}ds$$ When I use Mathematica with this code ...
364 views

### Can Mathematica read planar graphs with pc format?

We can download files about some special planar graphs at the following website, but their files are suffixed with pc. http://users.cecs.anu.edu.au/~bdm/data/planegraphs.html I don't know how to ...
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1 vote
63 views