Shin-Ichi Nishiyama is on CollEc

rank value
closeness 21770 5.31464
betweenness 18004 0.415411

co-authors

  1. Ryo Kato [pka55]
  2. Masao Ogaki [pog9]
  3. WAKO WATANABE [pwa369]
  4. Ian Christensen [pch762]