帮忙看看mathematica解偏微分方程?DSolve[{\!\(\*SubscriptBox[\(\[PartialD]\),\(t\)]\(C[x,y,t]\)\) == k*(\!\(\*SubscriptBox[\(\[PartialD]\),\(x,x\)]\(C[x,y,t]\)\) + \(\*SubscriptBox[\(\[PartialD]\),\(y,y\)]\(C[x,y,t]\)\)),C[x0,y0,0] == Q},C[x,

帮忙看看mathematica解偏微分方程?DSolve[{\!\(\*SubscriptBox[\(\[PartialD]\),\(t\)]\(C[x,y,t]\)\) == k*(\!\(\*SubscriptBox[\(\[PartialD]\),\(x,x\)]\(C[x,y,t]\)\) + \(\*SubscriptBox[\(\[PartialD]\),\(y,y\)]\(C[x,y,t]\)\)),C[x0,y0,0] == Q},C[x,
帮忙看看mathematica解偏微分方程?

DSolve[{\!\(
\*SubscriptBox[\(\[PartialD]\),\(t\)]\(C[x,y,t]\)\) == k*(\!\(
\*SubscriptBox[\(\[PartialD]\),\(x,x\)]\(C[x,y,t]\)\) + \(
\*SubscriptBox[\(\[PartialD]\),\(y,y\)]\(C[x,y,t]\)\)),
C[x0,y0,0] == Q},C[x,y,t],{x,y,t}]

帮忙看看mathematica解偏微分方程?DSolve[{\!\(\*SubscriptBox[\(\[PartialD]\),\(t\)]\(C[x,y,t]\)\) == k*(\!\(\*SubscriptBox[\(\[PartialD]\),\(x,x\)]\(C[x,y,t]\)\) + \(\*SubscriptBox[\(\[PartialD]\),\(y,y\)]\(C[x,y,t]\)\)),C[x0,y0,0] == Q},C[x,
函数名不要用C,保留字.
DSolve[{\!\(
\*SubscriptBox[\(\[PartialD]\),\(t\)]\(cC[x,y,t]\)\) == k*(\!\(
\*SubscriptBox[\(\[PartialD]\),\(x,x\)]\(cC[x,y,t]\)\) + \!\(
\*SubscriptBox[\(\[PartialD]\),\(y,y\)]\(cC[x,y,t]\)\)),
cC[x0,y0,0] == Q},cC[x,y,t],{x,y,t}]
微分方程本身的问题,解不出.