Coding Theory, Combinatorial Search Problems (Group Testing, Graph Search), Combinatorics, Graph Theory.
Journal papers
H. Chang and C.-C. Hsu (2026) Lemmas on traceability codes and an upper bound for 4-traceability. Des. Codes Cryptogr. 94: 7. https://rdcu.be/eV6T4
H. Chang, S.-P. Eu, S. Fu, Z. Lin, and Y.-H Lo (2021) Signed Mahonian polynomials for major and sorting indices, Journal of Algebraic Combinatorics, 53: 201–226.
https://link.springer.com/article/10.1007%2Fs10801-019-00926-2
H. Chang, D. Gerbner and B. Patkos (2020) Finding non-minority balls with majority and plurality queries, Discrete Applied Mathematics, 284: 631-639.https://www.sciencedirect.com/science/article/pii/S0166218X20301165
H. Chang and H.-M. Chu (2020) Error-tolerant Nonadaptive Interval Group Testing with Density-based Tests, Theoretical Computer Science, 815:60-68. https://www.sciencedirect.com/science/article/pii/S0304397520301249
H. Chang, H-L Fu and C-H Shih (2018) Learning a hidden uniform hypergraph, Optimization Letters, 12(1): 55-62.
H. Chang and W.-C. Lan (2017) Interval group testing for consecutive positives, Discrete Mathematics 340: 1488-1496.
C.-H. Chang and H. Chang (2016) On the Bernoulli automorphism of reversible linear cellular automata, Information Sciences 345: 217–225.
H. Chang and Y.-T. Tsai (2016) Improvements on some error-tolerance pooling designs, Discrete Applied Mathematics 200: 18–22.
H. Chang, Y-C Chiu and Y.-L. Tsai (2015) A variation of cover-free families and its applications, Journal of Computational Biology 22: 677-686.
H. Chang, S.-P. Eu and P.-L. Yen (2014) Variances and determinantal profiles of orientations, Linear Algebra and its Applications 457: 209-223.
H. Chang, H.-L. Fu and C.-H. Shih (2014) Learning a hidden graph, Optimization Letters, 8:2341–2348.
H. Chang, S.-P. Eu and Y.-H. Lo (2014) Sign imbalances of snakes and valley signed permutations, Advances in Applied Mathematics 59: 26–47.
H. Chang, Y.-L. Tsai (2014) Threshold group testing with consecutive positives, Discrete Applied Mathematics 169: 68-72.
H. Chang, H. L. Fu and C. H. Shih (2013) Threshold Group Testing on Inhibitor Model, Journal of Computational Biology 20(6): 464-470.
H. Chang (2013) Sortabilities of partition properties in multi-dimensional parameter spaces, Discrete Mathematics 313: 326–329.
H. Chang, H. L. Fu and M.-Y. Lien (2013) The Decycling Number of Outerplanar Graphs, Journal of Combinatorial Optimization (SI: Optimization in Graphs) 25(4): 536-542 (DOI 10.1007/s10878-012-9455-1).