Ahmet Hamal, Co-derivative and derivative operators on commutative bounded integral residuated lattices, Filomat, Vol. 39, No. 1 (2025), pp. 113-130 ...

Pseudo-differential operators have emerged as pivotal tools in modern analysis, generalising classical differential operators to encapsulate non-local behaviour via their symbol calculus.

We study the pseudospectral theory of a variety of non-self-adjoint constant coefficient and variable coefficient differential operators, showing that the phenomenon of non-trivial pseudospectra is ...