# User Portlet

Discussions |
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Is there any chance that a seriously interested (but still home based) person can use MMA to check the latest claimed, largest Mersenne prime? My machine just overheats? |

I am trying to calculate the electric field potential above a charged, insulating, disc. The simple version has the potential evaluated along the y-axis if the disc lies in the x-z plane and centred at the origin. In polar coordinates the integral is... |

Hi I am looking at some simple electricity and magnetism problems and want to use various tools to look at the electrostatic vector field. In my attached (M10) notebook I try to use ListStreamPlot and ListVectorPlot as alternatives to do this. I can... |

I am working with tensors for the first time and am trying to solve some simple problems with the inertia tensor in 3-D. All goes well until I try some simple coordinate system rotations using the RotationMatrix function. I have built a very simple... |

I am teaching myself simple classical mechanics and have a model of a particle moving in a central,conservative force field in 2D. As a function of time, I can plot the radius vector (nice ellipse as expected) or the velocity vector (...). What I... |

Hi, I am trying to learn how to use the EquationTrekker package inside Mathematica 10.0.02. As soon as I try and run even the simple example from the documentation centre, I just get a some very strange error messages. I have attached the example... |

In a simple study of a chaotic system (spring pendulum) I am looking at a variety of ways of presenting my results. One of the simplest should be a series of time snapshots of the pendulum bob position. I use NDSolve to get a function that returns... |

An option ("DebuggerSettingsBreakpointsWindowSize->{Full, Full}") was encountered with a right-hand side value out of the supported range for this option. |