5 citations · 8 across the 5 of their papers we have counts for
6 papers
Secretary problem: graphs, matroids and greedoids
Wojciech Kordecki
In the paper the generalisation of the well known "secretary problem" is considered. The aim of the paper is to give a generalised model in such a way that the chosen set of the po…
Greedy online colouring with buffering
Wojciech Kordecki, Anna Łyczkowska-Hanćkowiak
We consider the problem of online graph colouring. Whenever a node is requested, a colour must be assigned to the node, and this colour must be different from the colours of any of…
Additive versus multiplicative parameters - applications in economics and finance
Helena Jasiulewicz, Wojciech Kordecki
In this paper, we pay our attention to geometric parameters and their applications in economics and finance. We discuss the multiplicative models in which a geometric mean and a ge…
Ruin probability of a discrete-time risk process with proportional reinsurance and investment for exponential and Pareto distributions
Helena Jasiulewicz, Wojciech Kordecki
In this paper a quantitative analysis of the ruin probability in finite time of discrete risk process with proportional reinsurance and investment of finance surplus is focused on.…
Hyperplanes and hamiltonian circuits in Perfect Matroid Designs with fixed basis
Wojciech Kordecki
We study the number of hamiltonian circuits, containing a fixed basis, and the number of hyperplanes, which do not contain a fixed basis in perfect matroid designs. Projective and…
A Proof on Asymptotics of Wavelet Variance of a Long Memory Process by Using Taylor Expansion
Wonsang You, Wojciech Kordecki
A long memory process has self-similarity or scale-invariant properties in low frequencies. We prove that the log of the scale-dependent wavelet variance for a long memory process…