Can someone help in plotting this graph? K is a parameter. Thanks
1 + 1/(4*k^2 + (2*k*Sqrt[t])/Abs[y] e^(-(y^2/(4*k*t))) +
Sqrt[k*Pi]*Erf[Abs[y]/(2*Sqrt[k*t])])
Manipulate[
Plot3D[
(4 k^2 + (2 E^(-(y^2/(4 k t))) k Sqrt[t])/Abs[y] +
Sqrt[k] Sqrt[π] Erf[Abs[y]/(2 Sqrt[k t])])^-1
, {t, -8, 8}
, {y, -8, 8}
, PlotRange -> Full
], {k, -2, 2}]

Ein Mathematica, note. – MarcoB Jan 25 '16 at 17:31Plot? Probably you can make aTable(look it up in the documentation) of these functions, one for eachk, and thenPlotthem. – march Jan 25 '16 at 17:32