Poly H. da Silva

activity

20172020

most citedRandom derangements and the Ewens Sampling Formula

1 citations · 1 across the 3 of their papers we have counts for

collaborators

3 papers

math.PR2020★ 1 cited

Random derangements and the Ewens Sampling Formula

Poly H. da Silva, Arash Jamshidpey, Simon Tavaré

We study derangements of ${1, 2, \dots, n}$ under the Ewens distribution with parameter $θ$ . We give the moments and marginal distributions of the cycle counts, the number of cycle…

math.CO2018

Partial geodesics on symmetric groups endowed with breakpoint distance

Poly H. da Silva, Arash Jamshidpey, David Sankoff

The notion of partial geodesic was introduced by Jamshidpey et al. in "Sets of medians in the non-geodesic pseudometric space of unsigned genomes with breakpoints", 2014. In this p…

math.CO2017

Median inverse problem and approximating the number of $k$ -median inverses of a permutation

Poly H. da Silva, Arash Jamshidpey, David Sankoff

We introduce the "Median Inverse Problem" for metric spaces. In particular, having a permutation $π$ in the symmetric group $S_{n}$ (endowed with the breakpoint distance), we study t…

Random derangements and the Ewens Sampling Formula

Partial geodesics on symmetric groups endowed with breakpoint distance

Median inverse problem and approximating the number of k-median inverses of a permutation

Median inverse problem and approximating the number of $k$ -median inverses of a permutation