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D.15.5.13 setinitials

Procedure from library finitediff.lib (see finitediff_lib).

Usage:
setinitials(V,D[,P]); V,D,P are lists with strings as elements

Return:
no return value: sets the dependence order of the occuring derivatives, constructs the suitable ring to compute in containing user chosen parameters, sets new basering

Note:
P is optional, used to introduce some additional parameters into the ring. The Sine and Cosine values needed for the fourier transformation are symbolically introduced under the names string(c)+nameof(variable), i.e. if x is any spatial variable then cx:=cosine(dx*ksi), when regarding the fourier transform after ksi (for sine respectively). Artificial parameters I,T,Px,Py are introduced for the later eigenvalue analysis. Variables can be transformed into parameters of similar name

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.