Vol. 15 No. 2 (2023)

Scientific articles

• Metric and topology on the poset of compact pseudoultrametrics

  S. Nykorovych, O. Nykyforchyn

  321-330

  • Article
• On the semigroup $\boldsymbol{B}_{\omega}^{\mathscr{F}_n}$, which is generated by the family $\mathscr{F}_n$ of finite bounded intervals of $\omega$

  O.V. Gutik, O.B. Popadiuk

  331-355

  • Article
• Some remarks on spectrum of nonlinear continuous operators

  K.N. Soltanov

  356-376

  • Article
• Characterizing Riesz bases via biorthogonal Bessel sequences

  E. Zikkos

  377-380

  • Article