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This paper presents a 4 moment formulation of
the diagonal form FMM in three dimensional elastodynamics in the
frequency domain. This formulation enables a fast construction of the
coefficient matrix of BIEM (boundary integral equation method) with
operations when the domain size is much larger than the
wavelength, where is the number of unknowns. The proposed
formulation is utilised and concluded to be effective in an analysis of
the scattering of elastic waves by cracks.

2001-12-14