Ryuichiro Ishikawa is on CollEc

rank value
closeness 18999 5.29907
betweenness 20198 0.235607

co-authors

  1. Tomoki Fujii [pfu41]
  2. Nobuyuki Hanaki [pha135]
  3. Eizo AKIYAMA [pak195]
  4. Yukihiko Funaki [pfu167]
  5. Noritaka Kudoh [pku73]
  6. Adrian Penalver [ppe794]