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\partial T/\partial t + \partial^2 T/\partial x^2=\delta(x)
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\partial T/\partial t + \partial^2 T/\partial x^2=0
T(0,x)=\delta(x)
T(t,0)=0
T(t,L)=0

\partial T/\partial t + \partial^2 T/\partial x^2=0
T(0,x)=0
T(t,0)=\delta(t)
T(t,L)=0

\partial T/\partial t + \partial^2 T/\partial x^2=0
T(0,x)=0
T(t,0)=0
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