On multipoint constraints in FETI methods
Pavla Hrušková, Zdeněk Dostál, Oldřich Vlach, Petr Vodstrčil (2025)
Applications of Mathematics
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FETI (finite element tearing and interconnecting) based domain decomposition methods are well-established massively parallel methods for solving huge linear systems arising from discretizing partial differential equations. The first steps of FETI decompose the domain into nonoverlapping subdomains, discretize the subdomains using matching grids, and interconnect the adjacent variables by multipoint constraints. However, the multipoint constraints enforcing identification of the corners'...