Mountain View

Ku Cheng Yeaw

Office: SPMS-MAS-05-11
School of Physical & Mathematical Sciences
Nanyang Technological University
21 Nanyang Link, Singapore 637371

Links

I am a senior lecturer in the Division of Mathematical Sciences (SPMS) at Nanyang Technological University.
PhD Mathematics (2005), Queen Mary University of London (Advisor: Peter J. Cameron)
Harry Bateman Research Instructor (2005-2008), California Institute of Technology
Visiting Fellow, Lecturer, Senior Lecturer (2008-2016), National University of Singapore
Research interests: Combinatorics and Graph Theory

Publications

  1. C. Y. Ku and K. B. Wong, Diversity and intersecting theorems for weak compositions, Discrete Mathematics, 348 (2), 114250 (2025). [link]
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  2. C. Y. Ku and K. B. Wong, On stabilizing index and cyclic index of certain amalgamated uniform hypergraph, Linear Algebra and Its Applications, 703 (15) (2024): 109-136. [link]
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  3. H. H. Chan, S. H. Chan, T. G. Chua and C. Y. Ku, On theorems of Fermat, Wilson and Gegenbauer, Canadian Mathematical Bulletin, 67 (2) (2024): 304-317. [link]
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  4. Z. K. S. Koh, C. Y. Ku, and K. B. Wong, Alternating sign property of the perfect matching derangement graph, Journal of Combinatorial Theory, Series A, 194 (2023) 105706. [link]
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  5. C. Y. Ku and K.B. Wong, On the Number of Nonnegative Sums for Semi-partitions, Graphs and Combinatorics, 37 (2021) 2803-2823. [link]
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  6. C. Y. Ku and K. B. Wong, On diversity of certain t-intersecting families, Bull. Korean Math. Soc., 57(4), 815-829 (2020). [link]
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  7. C. Y. Ku and K. B. Wong, Erdos-Ko-Rado theorems for set partitions with certain block size, Journal of Combinatorial Series A, 172 105180 (2020). [link]
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  8. C. Y. Ku and K. B. Wong, On Cross Parsons Numbers, Graphs and Combinatorics, 35 287-301 (2019). [link]
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  9. C. Y. Ku and K. B. Wong, On Eigenvalues of the matching derangement graph, Journal of Algebraic Combinatorics 48(4), 627-646 (2018). [link]
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  10. C. Y. Ku and K. B. Wong, On No-Three-In-Line Problem on m-Dimensional Torus, Graphs and Combinatorics 34, 355-364 (2018). [link]
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  11. C. Y. Ku and K.B . Wong, On the Number of Nonnegative Sums for Certain Function, Bulletin of the Malaysian Mathematical Sciences Society 43, 15-24 (2018). [link]
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  12. C. Y. Ku, T. Lau, and K. B. Wong, The spectrum of eigenvalues for certain subgraphs of the k-point fixing graph, Linear Algebra and its Applications 543, 72-91 (2018). [link]
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  13. C. Y. Ku and K. B. Wong, An Erdős-Ko-Rado theorem For minimal covers, Bulletin of the Korean Mathematical Society 54, 875-894 (2017). [link]
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  14. C. Y. Ku, Terry Lau, and K. B. Wong, On the partition associated to the smallest eigenvalues of the k-point fixing graph, European Journal of Combinatorics 63, 70-94 (2017). [link]
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  15. C. Y. Ku, Terry Lau and K. B. Wong, Largest independent sets of certain regular subgraphs of the derangement graph, Journal of Algebraic Combinatorics, 44(1): 81-98 (2016). [link]
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  16. C. Y. Ku, Terry Lau and K. B. Wong, The smallest eigenvalue of the 1-point fixing graph, Linear Algebra and Its Applications, 493, 433-446 (2016). [link]
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  17. C. Y. Ku and K. B. Wong, A non-trivial intersection theorem for permutations with fixed number of cycles. Discrete Mathematics 339(2): 646-657 (2016) [link]
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  18. C. Y. Ku and K. B. Wong, An analogue of the Hilton-Milner Theorem for weak compositions, Bull. Korean Math. Soc. 52(3), 1007-1025 (2015). [link]
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  19. C. Y. Ku and K. B. Wong, A generalization of very odd sequences, The Electronic Journal of Combinatorics 22(2), #P2.12 (2015). [link]
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  20. C. Y. Ku and K. B. Wong, A Deza-Frankl Type Theorem for Set Partitions, The Electronic Journal of Combinatorics 22(1), #P1.84 (2015). [link]
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  21. C. Y. Ku and K. B. Wong, On r-cross t-intersecting families for weak compositions, Discrete Mathematics 338(7), 1090–1095 (2015). [link]
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  22. Alan J. Aw and C. Y. Ku, The covering radius problem for sets of 1-factors of the complete uniform hypergraphs, Discrete Mathematics 338(6), 875–884 (2015). [link]
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  23. C. Y. Ku, Terry Lau and K. B. Wong, Cayley graphs on symmetric group generated by elements fixing k points, Linear Algebra and Its Applications 471, 405–426 (2015). [link]
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  24. C. Y. Ku and K. B. Wong, An Erdos-Ko-Rado Theorem for permutations with fixed number of cycles, The Electronic Journal of Combinatorics 21(3), #P3.16 (2014). [link]
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  25. C. Y. Ku and K. B. Wong, Gallai-Edmonds structure theorem for weighted matching polynomial, Linear Algebra and its Applications 439, 3387–3411 (2013). [link]
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  26. C. Y. Ku and K. B. Wong, An analogue of the Erdos-Ko-Rado theorem for weak compositions, Discrete Mathematics 313, 2463–2468 (2013). [link]
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  27. C. Y. Ku and K. B. Wong, A Kruskal–Katona type theorem for integer partitions, Discrete Mathematics 313, 2239–2246 (2013). [link]
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  28. C. Y. Ku and K. B. Wong, Generalizing Tutte’s theorem and maximal non-matchable graphs, Discrete Mathematics 313, 2162-2167 (2013). [link]
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  29. C. Y. Ku and K. B. Wong, On r-cross intersecting families of sets, Far East Journal of Mathematical Sciences 75, 295-300 (2013).
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  30. C. Y. Ku and K. B. Wong, An analogue of Hilton-Milner theorem for set partitions, Journal of Combinatorial Theory Series A 120, 1508–1520 (2013). [link]
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  31. C. Y. Ku and K. B. Wong, Solving the Ku-Wales conjecture on the eigenvalues of the derangement graph, European Journal of Combinatorics, Volume 34, Issue 6, 941–956 (2013). [link]
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  32. C. Y. Ku and K. B. Wong, On 2-factor hamiltonian regular bipartite graphs, Acta Mathematica Hungarica 138, 173–178 (2013). [link]
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  33. C. Y. Ku and K. B. Wong, On cross-intersecting families of set partitions, The Electronic Journal of Combinatorics 19(4), #49 (2012). [link]
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  34. C. Y. Ku and K. B. Wong, Properties of ϑ-super positive graphs, The Electronic Journal of Combinatorics 19, #P37 (2012). [link]
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  35. C. Y. Ku and K. B. Wong, Generalized D-graphs for nonzero roots of the matching polynomial, Discrete Mathematics 311, 2174–2186 (2011). [link]
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  36. C. Y. Ku and K. B. Wong, Maximum multiplicity of matching polynomial roots and minimum path cover in general graph, The Electronic Journal of Combinatorics 18, #P38 (2011). [link]
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  37. C. Y. Ku and K. B. Wong, Group marriage problem, Journal of Combinatorial Theory Series A 118, 672-680 (2011). [link]
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  38. C. Y. Ku and K. B. Wong, Extensions of barrier sets to nonzero roots of the matching polynomial, Discrete Mathematics 310, 3544-3550 (2010). [link]
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  39. W. Chen and C. Y. Ku, An analogue of the Gallai-Edmonds structure theorem for nonzero roots of the matching polynomial, Journal of Combinatorial Theory Series B 100, 119-127 (2010). [link]
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  40. C. Y. Ku and D. Wales, Eigenvalues of the derangement graph, Journal of Combinatorial Theory Series A 117, 289-312 (2010). [link]
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  41. C. Y. Ku and K. B. Wong, Maximum multiplicity of a root of the matching polynomial of a tree and minimum path cover, The Electronic Journal of Combinatorics 16(1), #R81 (2009). [link]
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  42. C. Y. Ku and B. McMillan, Independent sets of maximal size in tensor powers of vertex transitive graphs, Journal of Graph Theory 60 (4), 295-301 (2009). [link]
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  43. C. Y. Ku and D. Renshaw, Erdos-Ko-Rado theorems for permutations and set partitions, Journal of Combinatorial Theory Series A 115, 1008-1020 (2008). [link]
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  44. C. Y. Ku and T. W. H. Wong, Intersecting families in the alternating group and direct product of symmetric groups, The Electronic Journal of Combinatorics 14, #R25 (2007). [link]
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  45. P. Keevash and C. Y. Ku, A random construction for permutation codes and the covering radius, Des. Codes. Crypt. 41, 79-86 (2006). [link]
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  46. I. Leader and C. Y. Ku, An Erdos-Ko-Rado theorem for partial permutations, Discrete Mathematics 306, 74-86 (2006). [link]
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  47. P. J. Cameron and C. Y. Ku, Intersecting families of permutations, European Journal of Combinatorics 24 (7), 881-890 (2003). [link]

Books

  1. Ku, C. Y., Tay, T. S., Toh P. C., & Toh, T. L. (2019). Singapore Mathematical Olympiads 2019 (PP. 58). Singapore: Singapore Mathematical Society.
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  2. Ku, C. Y., Tay, T. S., Toh, P. C., & Toh, T. L. (2018). Singapore Mathematical Olympiads 2018 (PP. 56). Singapore: Singapore Mathematical Society.
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  3. Ku, C. Y., Tay, T. S., Toh, P. C., & Toh, T. L. (2017). Singapore Mathematical Olympiads 2017 (PP. 59). Singapore: Singapore Mathematical Society.
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  4. Ku, C. Y., Tay, T. S., Toh, P. C., & Toh, T. L. (2016). Singapore Mathematical Olympiads 2016 (PP. 65). Singapore: Singapore Mathematical Society.
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  5. Ku, C. Y., Tay, T. S., Toh, P. C., & Toh, T. L. (2015). Singapore Mathematical Olympiads 2015 (PP. 70). Singapore: Singapore Mathematical Society.
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  6. Ku, C. Y., Tay, T. S., Toh, P. C., & Toh, T. L. (2014). Singapore Mathematical Olympiads 2014 (PP. 65). Singapore: Singapore Mathematical Society.
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