The paper derives a stability bound for a Galerkin/least-squares method with L2-optimal test functions on B-splines and reports numerical comparisons with SUPG, but benchmark and claim inconsistencies undermine the stated conclusions.
Evans, and Weifeng Qiu, A dual Petrov–Galerkin finite element method for the convection–diffusion equation, Computers & Mathematics with Applications 68(11) (2014) 1513–1529
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Stabilization of isogeometric finite element method with optimal test functions computed from $L_2$ norm residual minimization
The paper derives a stability bound for a Galerkin/least-squares method with L2-optimal test functions on B-splines and reports numerical comparisons with SUPG, but benchmark and claim inconsistencies undermine the stated conclusions.