7 citations · 7 across the 2 of their papers we have counts for
3 papers
cs.SC2018
Convolutions of Liouvillian Sequences
Sergei A. Abramov, Marko Petkovšek, Helena Zakrajšek
While Liouvillian sequences are closed under many operations, simple examples show that they are not closed under convolution, and the same goes for d'Alembertian sequences. Nevert…
math.CO2008★ 7 cited
On a conjecture of Ira Gessel
Marko Petkovsek, Herbert S. Wilf
Let F(m; n1, n2) denote the number of lattice walks from (0,0) to (n1,n2), always staying in the first quadrant {(n_1,n_2); n1 >= 0, n2 >= 0} and having exactly m steps, each of wh…
math.CO2008
Counting One-Vertex Maps
Alen Orbanic, Marko Petkovsek, Tomaz Pisanski +1
The number of distinct maps (pre-maps) with a single vertex and valence is computed for any value of . The types of maps (pre-maps) that we consider depend on whether the un…