which class or method takes instance of the procedure??

[neallee]

which class or method takes instance of the procedure that transfor the general eigenvalue problems into standard eigenvalue problems???

and i think frank you could let me know whether this function was been achieved in the lapack or arpack functions???

thanks very much!

[fmk]

the procedure for the eigen command can be found in OpenSees/SRC/commands.cpp ..
which lapack or arpack function is used depends on the class of EigenSolver selected by the user and construct3ed in this procedure .. the eigen solvers can be found in OpenSees/SRC/system_of_eqn/eigenSOE .. you can check out the calls here.

[neallee]

thankyou!
there are four kinds of eigen SOE there, and there are four kind of stiffness matrix storage schema,

isn't it? in eigen solvers?

Symarpack,bandarpack,fullgeneral, and symband

four kind of stiffness matrix...

$_$
thank you!