SturmLiouville Problems: SLEIGN2
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http://www.math.niu.edu/~zettl/SL2/  


Bailey, Everitt, Zettl, Garbow  
A code to compute eigenvalues and eigenfunctions, and to approximate the continuous spectrum of regular and singular SturmLiouville (SL) problems. These problems consist of a second order linear differential equation (py')' + qy = (lambda) w y on (a,b) together with boundary conditions (BC). The nature of the BC depends on the regular or singular classification of the end points a and b. For both cases the BC fall into two major classes: separated and coupled. The former are two separate conditions, one at each endpoint; the latter are two coupled conditions linking the values of the solution at the two endpoints, e.g. periodic and semiperiodic boundary conditions. SLEIGN2 seems to be the only general purpose code available for these periodictype problems. Site includes the four FORTRAN files of the package, and four text files of instructions and examples and such, as well as links to recent relevant papers.  


Levels:  College, Research 
Languages:  English 
Resource Types:  Articles, Topic Tools Miscellaneous 
Math Topics:  Eigenvectors/Eigenvalues, Partial Differential Equations 
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