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math.FA2026
On the Cyclicity Conjecture
Alexander Dobrick
We prove that the peripheral spectrum of every positive operator on a complex Banach lattice is cyclic, thereby resolving the cyclicity conjecture without additional growth assumpt…
math.FA2026
Individual and Uniform Eventual Positivity of Self-Adjoint Semigroups
Alexander Dobrick
We construct a real self-adjoint semigroup on an -space which is individually eventually strongly positive with respect to a strictly positive vector, but whose operators f…
math.FA2026
Banach's principle in vector lattices
Alexander Dobrick
We develop an abstract Banach principle in vector lattices and apply it to obtain lattice-theoretic versions of the individual and maximal ergodic theorems, without recourse to any…