Erdos number
Dr. Carson K. Leung's Erdős Number = 3
Carson K. Leung co-authored at least 1 paper with Heikki Mannila, who co-authored at least 1 paper with Béla Bollobás, who in turn co-authored at least 7 papers with Paul Erdős (Pál Erdős):
Béla Bollobás, Paul Erdős: On a Ramsey-Turán type problem. Journal of Combinatorial Theory, Series B, 21(2): 166-168 (October 1976)
Béla Bollobás, Gautam Das, Dimitrios Gunopulos, Heikki Mannila: Time-series similarity problems and well-separated geometric sets. In Proceedings of the 13th Annual Symposium on Computational Geometry (SCG 1997), Nice, France, June 04-06, 1997: 454-456.
Carson Kai-Sang Leung, Raymond T. Ng, Heikki Mannila: OSSM: a segmentation approach to optimize frequency counting. In Proceedings of the 18th IEEE International Conference on Data Engineering (ICDE 2002), San Jose, CA, USA, February 26-March 01, 2002: 583-592.
Reference: MathSciNet Collaboration Distance: Erdős Number
Dr. Carson K. Leung's
Erdős number = 3:
Carson K. Leung - Heikki Mannila - Béla Bollobás - Paul Erdős (Pál Erdős, 1913–1996)
Dijkstra number = 4:
Carson K. Leung - Heikki Mannila - Ralph-Johan Back - Alain J. Martin - Edsger W. Dijkstra (1930–2002)
Pólya number = 4:
Carson K. Leung - Heikki Mannila - Kurt Mehlhorn - Robert E. Tarjan - George Pólya (György Pólya, 1887–1985)
Carson K. Leung - Raymond T. Ng - S. Muthukrishnan - Robert E. Tarjan - George Pólya
Turing number = 5:
Carson K. Leung - Raymond T. Ng - Anil Nerode - K. Jon Barwise - Robin O. Gandy - Alan M. Turing (1912-1954)
von Neumann number = 5:
Carson K. Leung - Wenzhu Tong - Heng Ji - Ralph Grishman - Herman H. Goldstine - John von Neumann (1903–1957)