Research Interests
            Machine Learning & Data Science, Network Traversal & Obstruction, Spatial Pattern & Data Analysis, Proximity Catch Digraphs (PCDs), Statistical Methods for Medical Data & Image Analysis.
        
        
            Selected Publications
            
                - E. Ceyhan, J.C. Wierman, and P. Xiang. "Law of large numbers for a two-dimensional class cover problem." ESAIM: Probability and Statistics, 25:376-407, 2021.
- S. Bahadır and E. Ceyhan. "On the number of weakly connected subdigraphs in random kNN digraphs." Discrete & Computational Geometry, 65(1): 116-142, 2021.
- A. Manukyan and E. Ceyhan. "Classification using proximity catch digraphs." Machine Learning, 109(4): 761-811, 2020.
- A. Manukyan and E. Ceyhan. Classification of imbalanced data 
				with a geometric digraph family. Journal of Machine Learning 
				Research, 17(189):1-40, 2016.
- E. Ceyhan, "Segregation indices for disease clustering." 
				Statistics in Medicine, 33(10):1662-1684, May 2014.
- V. Aksakalli and E. Ceyhan. "Optimal obstacle placement with disambiguations." Annals of Applied Statistics, 6(4):1730-1774, 2012.
- E. Ceyhan, M. Hosakere, T. Nishino, et al. "Statistical analysis of cortical morphometrics using pooled distances based on labeled cortical distance maps." Journal of Mathematical Imaging and Vision, 40(1): 20-35, 2011.
- E. Ceyhan. "Extension of one-dimensional proximity regions 
				to higher dimensions." Computational Geometry: Theory and 
				Applications, 43(9):721-748, November 2010 [also featured at VerticalNews service of NewsRx.com].
- E. Ceyhan. "Overall and pairwise segregation tests based on 
				nearest neighbor contingency tables." Computational 
				Statistics & Data Analysis, 53(8):2786-2808, June 2009.
- E. Ceyhan. "The distribution of the domination number of 
				class cover catch digraphs for non-uniform one-dimensional 
				data." Discrete Mathematics, 308(23):5376-5393, 
				December 2008.
- E. Ceyhan, C. E. Priebe and D. J. Marchette. "A new family 
				of random graphs for testing spatial segregation." Canadian 
				Journal of Statistics, 35(1):27-50, February 2007.
For a full list of preprints and publications, visit the 
  Publications Page 
  or download my 
  CV.