no matrix inversion, no matrices multiplication: calculate all frecuencies in structural dynamics 10'000,000 of equations or more in ram memory, efficient algorithm on format banded or format skyline. It´s a 30 years of search in simultaneous equations. I have how demonstrate this big new idea. No more Lanczos, no more subspace iteration, no more jacobi: they use square matrices and matrix multiplication on square matrices. I hope that you accept this geat idea: SAP2000, ETAPS, MIDAS they don´t have this capacity algotithm.
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