MaplePrimes - answers and comments on Question, does anyone know how to solve

JacobiCN ?

Preben Alsholm — Wed, 30 Jan 2013 23:27:03 Z

FunctionAdvisor(definition,InverseJacobiCN);
FunctionAdvisor(definition,JacobiCN);
FunctionAdvisor(definition,InverseJacobiAM);

plot(JacobiCN(x,2),x=0..5);
eq:=diff(X(x), x, x)+(1.6+4*JacobiCN(x, 2)^2)*X(x) = 0;
T:=5: #Change as desired
res:=dsolve({eq,X(0)=1,D(X)(0)=0},numeric,range=0..T);
plots:-odeplot(res,[x,X(x)],0..T,refine=1);

Hi I get this error and thew graph won't

gdog — Thu, 31 Jan 2013 00:41:23 Z

Hi I get this error and thew graph won't update from 5,

Error, (in dsolve/numeric/process_input) incorrect form for derivatives: {(diff(diff(F(t), t), t))(x)}
Error, (in plots/odeplot) input is not a valid dsolve/numeric solution

thx

Copy?

Preben Alsholm — Thu, 31 Jan 2013 05:14:51 Z

Did you try copy and paste of the lines I wrote? Why does the error message mention an F? The unknown function has the name X.