Algebraic structures constitute a central theme in contemporary mathematics, encapsulating the interplay of operations on sets that adhere to specific axioms. The study of cohomology provides a ...
A classic math rule now handles infinity. New work strengthens the math behind physics and unbounded systems. % ...
If $T$ is an operator on a Hilbert space $\mathscr{H}$, this paper gives necessary and sufficient conditions on $T$ such that $C^\ast(T)$, the $C^\ast$-algebra ...
Given an exponentiable Lie algebra L of operators on a Hilbert space H, we study the spectrum of those self-adjoint, non-adnilpotent operators -iA, with A in L, for a certain class of solvable Lie ...