Recent content by ManuelF

  1. M

    Undergrad Solve Equation of Motion for Spring Damper System

    I have not understood the figure ... The mass is attached to the spring and the dashpot? For the system in figure (I've attached), the equation of motion is: m\ddot{x}+c\dot{x}+kx=0
  2. M

    Mathematica Constructing Phase Portrait of System with Mathematica

    How can I construct the phase portrait(with Mathematica) of the following system? \dot{x}(t)=y(t) \dot{y}(t)=-x^3(t)+4x(t)y(t)
  3. M

    Graduate Sufficient Condition for Existence of Vector Potential

    Thank you very much!
  4. M

    Graduate Sufficient Condition for Existence of Vector Potential

    That is a necessary condition, but I do not think is enough! Are you sure? Thank you.
  5. M

    Graduate Sufficient Condition for Existence of Vector Potential

    Hello! Can you tell me the sufficient condition for the existence of the vector potential? Thank you very much!
    • ManuelF
    • Thread
    • Potential Vector Vector potential
    • Replies: 4
    • Forum: Calculus