MathGroup Archive 2004

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UnitStep Function in ODE


Why it this the following so hard for Mathematica 5.0.0

   c[t] = 0.2*UnitStep[20 - t];
   eqn = y'[t] == 10.0*c[t] - 0.01*y[t]
   DSolve[{eqn, y[0] == y0}, y[t], t] // FullSimplify

--V. Stokes



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