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   • Vlad Bally

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2. AS++ T-splines: arbitrary degree, nestedness and approximation

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   • Xin Li

   OriginalPaper 27 July 2021 Pages: 795 - 816

   

3. Nearest \(\varOmega \)-stable matrix via Riemannian optimization

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   • Federico Poloni

   OriginalPaper Open access 03 August 2021 Pages: 817 - 851

   

4. Fiber product homotopy method for multiparameter eigenvalue problems

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   • Jin-Hong Du
   • Lek-Heng Lim

   OriginalPaper 04 August 2021 Pages: 853 - 888

   

5. A model reduction approach for inverse problems with operator valued data

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   • Herbert Egger
   • Matthias Schlottbom

   OriginalPaper Open access 16 August 2021 Pages: 889 - 917

   

6. A priori and a posteriori error analysis of an unfitted HDG method for semi-linear elliptic problems

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   • Tonatiuh Sánchez-Vizuet
   • Manuel E. Solano

   OriginalPaper 07 August 2021 Pages: 919 - 958

7. Numerical methods for scattering problems in periodic waveguides

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   OriginalPaper Open access 16 August 2021 Pages: 959 - 996