Problem with DSOLVE (Error using symengine)

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sanderos
sanderos 2014 年 8 月 4 日
コメント済み: sanderos 2014 年 8 月 5 日
Hey guys, basically I try to translate this maple-code
in matlab. Not so much to change, here the code so far:
function test
syms A rr th nu ff(th) gg(rr)
phi = A*rr^2*log(rr);
srr = simplify((diff(phi, rr))/rr + (diff(phi, th, 2))/rr^2);
stt = simplify(diff(phi, rr, 2));
srt = simplify(-(diff((diff(phi, th))/rr, rr)));
kappa = 3-4*nu;
Epsrr = simplify(((kappa+1)*srr-(3-kappa)*stt)/4);
Epstt = simplify(((kappa+1)*stt-(3-kappa)*srr)/4);
Epsrt = srt;
tmur1 = int(Epsrr, rr);
e1 = rr*Epstt-tmur1;
tmut1 = int(e1, th);
tmur2 = tmur1+diff(ff(th), th);
tmut2 = simplify(tmut1+gg(rr)-ff(th));
hh = simplify(expand(rr*(Epsrt-(1/2)*((1/rr)*diff(tmur2, th) + ...
diff(tmut2, rr)-tmut2/rr))));
h1 = int(diff(hh), th);
h2 = hh-h1;
sl = dsolve(h1==0);
However, there is a problem with dsolve ('Error using symengine').
Any suggestions to correct this?
Thanks
  1 件のコメント
sanderos
sanderos 2014 年 8 月 5 日
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