Sang-Ki Ko

activity

20162025

most citedSoccerCPD: Formation and Role Change-Point Detection in Soccer Matches Using Spatiotemporal Tracking Data

17 citations · 54 across the 10 of their papers we have counts for

collaborators

Showing 2017Show all

2 papers · 1 filter

cs.CC2017★ 1 cited

Composition problems for braids: Membership, Identity and Freeness

Sang-Ki Ko, Igor Potapov

In this paper we investigate the decidability and complexity of problems related to braid composition. While all known problems for a class of braids with three strands, $B_{3}$ , hav…

cs.DM2017

On the Identity Problem for the Special Linear Group and the Heisenberg Group

Sang-Ki Ko, Reino Niskanen, Igor Potapov

We study the identity problem for matrices, i.e., whether the identity matrix is in a semigroup generated by a given set of generators. In particular we consider the identity probl…