Похоже, мой комп слабоват..
Решаю систему Д.У. в Мапле, вот код:
Цитата:
restart; x1(t):= diff(x(t),t);x2(t):=diff(diff(x(t),t),t); x3(t):=diff(diff(diff(x(t),t),t),t); y1(t):= diff(y(t),t);y2(t):=diff(diff(y(t),t),t); y3(t):=diff(diff(diff(y(t),t),t),t); z1(t):= diff(z(t),t);z2(t):=diff(diff(z(t),t),t); z3(t):=diff(diff(diff(z(t),t),t),t); sys1 := {(x1(t)^2+y1(t)^2+z1(t)^2)^3*k^2=(y1(t)*z2(t)-z1(t)*y2(t))^2+(z1(t)*x2(t)-x1(t)*z2(t))^2+(x1(t)*y2(t)-y1(t)*x2(t))^2, ((y1(t)*z2(t)-z1(t)*y2(t))^2+(z1(t)*x2(t)-x1(t)*z2(t))^2+(x1(t)*y2(t)-y1(t)*x2(t))^2)*R=x1(t)*(y2(t)*z3(t)-z2(t)*y3(t))-y1(t)*(z2(t)*x3(t)-x2(t)*z3(t))+z1(t)*(x2(t)*y3(t)-y2(t)*x3(t))}; dsolve(sys1);
а комп жуёт её, жуёт.. и всё...
