Please specify the dimension of the vector y here n = Important: 1 <= n <= 10!
Please write here the piece of code which computes the functions f1,...,fn which make up the right hand side of the ode y' = f(t,y), f = (f1,...,fn)T. They must have the structure fi = fi(t,y(1),...,y(n)). You must obey the FORTRAN conventions. You might use here variables i,j,k (e.g. for loops or counting), the logicals bool1, bool2 , bool3, a vector of 100 components v(.) , the variables h1,h2,h3,h4 (e.g. for intermediate calculations) which all are initialized with zero resp. false and the constants pi, e, sqrt2 (with their mathematical meaning). f(1)=-4.d0*y(1)+y(1)*y(2)*0.1d0+3.d0*y(2) f(2)=1.d0*y(1)-2.d0*y(2)-0.1d0*y(1)*y(2)+0.1d0
Specify the integration interval:
Specify the initial values for y This is a list of n numbers, separated by blank or comma. 1.0, -4.0
Select two components of y for plotting: index1=index2=1 is allowed
please specify the relative precision you want to obtain tolrel = please specify a typical value for ''small'' function values to be replaced by this parameter smally in the relative error criterion: smally=
Please select the maximum allowed stepsize hmax: hmax = Important: 0 < hmax < (tend-t0)/2 !
Please specify the maximal order allowed: maxorder= Important: 2 <= maxorder <= 16 and even
Please specify the number of subintervals of equal length, which must be processed separately: 1 <= num <= 100. 1 means there are no fixed intermediate grid points (recommended).
Warning!!! - This may take some time.
Click on "evaluate", in order to submit your input.
22.03.2011