26 citations · 32 across the 11 of their papers we have counts for
4 papers · 1 filter
Yet another approach to measuring distance in some hyperspaces
Dariusz Bugajewski, Piotr Maćkowiak
In this article, we define a new partial distance on hyperspaces consisting of closed balls, which is a partial metric in the sense of Matthews. We prove that these partial metric…
When surjectivity demands pathology
Piotr Kasprzak, Piotr Maćkowiak
In this paper, we characterize surjective nonlinear composition operators acting between the space of sequences of bounded variation and the space of bounded sequences. We show tha…
On the independence of axioms for measures of non-compactness
Jerzy Grzybowski, Piotr Kasprzak, Piotr Maćkowiak
We investigate the independence of the axioms in the Banaś--Goebel approach to the theory of measures of non-compactness. We present a complete answer for four of the five axioms.…
Non-external Proofs of Lagrange Inversion Formula
Dominik Beck, Piotr Maćkowiak
The goal of the paper is to present two simple proofs of the Lagrange Inversion Formula for formal power series. Both proofs are non-external in the sense that they use concepts th…