I collect here more theoretical publications, usually the ones that do not fit into the other categories (Partial Differential Equations, Numerical Methods, Quantum Mechanics, of Financial Mathematics).

Nevertheless, I begin with some papers that have to do with pseudodifferential operators invariant with respect to a group action and the study of the Fredholmness  of their restrictions to isotypical components.

1. Fredholm conditions and index for restrictions of invariant pseudodifferential operators to isotypical components, Alexandre Baldare, Rémi Côme, Matthias Lesch, and Victor Nistor, Münster J. Math., vol. 14(2), pages 403–443 (2021).
2. Fredholm conditions for operators invariant with respect to compact Lie group actions, Alexandre Baldare, Rémi Côme, and Victor Nistor, C. R., Math., Acad. Sci. Paris, vol. 359(9), pages 1135–1143 (2021).

(Under construction, last updated June 15, 2025.)