23rd Korean Workshop on Computational Geometry

Koh Samui (Samui Island), Thailand. July 3-7, 2023

The 23rd Annual Korean Workshop on Computational Geometry (KWCG 2023) will be held in “Koh Samui (Samui Island), Thailand” in the week July 3 - July 7, 2023. Koh Samui (or Ko Samui, shortened to KohSam) (Wikipedia, is an island and city off the east coast of the Kra Isthmus, Thailand.

The aim of the workshop is to provide a forum for researchers working in computational geometry to discuss and work together on research problems. Following the tradition of the preceding workshops, we hope to have active discussions and to work together on research problems, in particular in, but not limited to, the area of computational geometry. Therefore I would like you to bring some interesting open problems that can be explained quickly. This time, there will be sessions on “Optimal data structures and algorithmic applications in dynamic geometric environments” as part of the workshop.

Open Problems:

As usual the workshop will mostly consist of research work in small, spontaneously formed groups. We will work on open problems presented by the participants within the first two days of the meeting. Therefore, participants are asked to prepare presentations (~10-15 min.) introducing interesting research topics including open problems.

Venue, Accommodation, and Others:

The workshop will be held at SAii Koh Samui Choengmon. You can find some information at We booked a block of rooms as a meeting package. Each participant is supposed to arrive on July 2 and depart on July 7. We will provide a link for room reservation in March 2023.

Transfer from Bangkok:

Samui Island can be reached by flights from Suvarnabhumi Airport (BKK) by Bangkok Airways ( There are about 10 flights a day.

Another option is to take flights operated by ThaiAirsia ( from DonMuang airport to Surat Thani airport, take a coach to Donsak Pier and then take a ferry to Nathon Pier at Samui island.
On 2 July, there is a flight at 06:50 from DonMuang airport to Surat Thani airport, but the booking is not possible yet (There might be a few more flights but they are not available yet). The ticket will be available about one month in advance. It takes at least 2 hour to travel from Suvarnabhumi Airport (BKK) to Don Muang airport (DMK). You may consider to stay a night at Amari Hotel ( ) opposite to Don Muang airport, or Centara Grand Central Plaza Ladprao (

Transfer from Samui Airport:

It takes about 30 mins from the airport to SAii Koh Samui Choengmon Hotel. The hotel can arrange transit from the airport. It costs about 1,000 THB per person per trip.

The organizers

  • Hee-Kap Ahn, Pohang University of Science and Technology (POSTECH),
  • Sang Won Bae, Kyonggi University,
  • Otfried Cheong, SCALGO,
  • Natsuda Kaothanthong, Sirindhorn International Institute of Technology (SIIT),


  • July 2 (Sunday) Arrival
  • July 3-6 (Monday to Thursday) 09:00-12:00 Workshop Session, 13:30-18:00 Discussion in groups
  • July 5 (Wednesday) 13:30-18:00 SW Starlab session "Optimal data structures and algorithmic applications in dynamic geometric environments"
  • July 6 (Thursday) 17:00-18:00 Wrap-up session
  • July 7 (Friday) 09:00-10:30 Wrap-up session

Confirmed Participants

  • Mikkel Abrahamsen (Universtiy of Copenhagen)
  • Hee-Kap Ahn (Pohang University of Science and Technology)
  • Taehoon Ahn (Pohang University of Science and Technology)
  • Sang Won Bae (Kyonggi University)
  • Siu-Wing Cheng (Hong Kong University of Science and Technology)
  • Otfried Cheong (SCALGO)
  • Jinhee Chun (Tohoku University)
  • Chaeyoon Chung (Pohang University of Science and Technology)
  • Sarita de Berg (Utrecht University)
  • Supanut Chaidee (Chiangmai University)
  • Michael Dobbins (Binghamton University)
  • Natsuda Kaothanthong (Sirindhorn International Institute of Technology)
  • Tip-aroon Keowkaew (Sirindhorn International Institute of Technology)
  • Katharina Klost (Freie University Berlin)
  • Christian Knauer (Bayreuth University)
  • Seungjun Lee (Pohang University of Science and Technology)
  • Chih-Hung Liu (National Taiwan University)
  • Wolfgang Mulzer (Freie University Berlin)
  • Yoshio Okamoto (Univeristy of Electro-Communications)
  • Zuzana Patáková (Charles University)
  • Nattawut Phetmak (Sirindhorn International Institute of Technology)
  • Michiel Smid (Carleton University)
  • Fabian Stehn (Bayreuth University)
  • Pitchayagan Temniranrat (Sirindhorn International Institute of Technology)
  • Takeshi Tokuyama (Kwansei Gakuin University)
  • Antoine Vigneron (Ulsan University of Science and Technology)
  • Sampson Wong (University of Sydney)
  • Sang Duk Yoon (Sungshin Women's University)
  • Hanwen Zhang (Universtiy of Copenhagen)

Previous workshops


The workshop is partly supported by the Software Star Lab grant (No. 2017-0-00905) funded by the Korea government (Institute of Information & communications Technology Planning & Evaluation (IITP))).

SW StarLab