ISAGANI B. JOS, Ph.D.

My research is on Graph theory, primarily on the singularity/nonsingularity of graphs; on the nullity of graphs and on other characteristics of graphs. I also have research interests on the fitting of the mortality experience of countries to known laws of mortality.

I have a PhD in Mathematics obtained at the De La Salle University. My dissertation is on the singularity/nonsingularity of digraphs. I finished an MS in Mathematics with specialization in Actuarial Science from the University of the Philippines in Diliman and a BS in Mathematics, major in Actuarial Science from the University of Santo Tomas.

I was also a board member of the Mathematical Society of the Philippines and acted as its secretary from 2016-2019. I was also a member of the Actuarial Educators Network of the International Actuarial Association from its inception in 2010.

Associate Professor

PhD in Mathematics, MS Mathematics (with specialization in Actuarial Science); BS Mathematics, major in Actuarial Science

Graph Theory, Actuarial Science

• “The spanning maximal planar subgraph problem for some classes of complete 4-partite graphs” (co-authored with T.J.
  Estrada), Advances in Intelligent Systems and Computing: Proceedings of the 7 th International Conference on Mathematics
  and Computing, Vol. 1412, March 2022
• “The Euclidean dimension of the join of two cycles”(co-authored with S. Gervacio), Discrete Mathematics, Vol. 308, Issue
  23, 2008
• “Generating Spanning Maximal Planar Subgraphs of Complete 4-Partite Graphs” (co-authored with Estrada, T. J.),
  Manila Journal of Science, Vol. 12, 2019.
• “Fitting a Leslie matrix model for the Philippines and other Asian countries”, (co-authored with R. M. Coloso and D. N.
  Tieng), The Proceedings of the 2018 DLSU Research Congress, De La Salle University
• “A CRNT Approach to the Hawk and Dove Game”, (co-authored with M. A. Garcia, Y. Lim and E. Nocon), The
  Proceedings of the 2018 DLSU Research Congress, De La Salle University.
• “Preliminary Results on the Spanning Maximal Planar Subgraph Problem for Complete 4-Partite Graphs”, (co-authored
  with T. J. Estrada), The Proceedings of the 2017 DLSU Research Congress, De La Salle University.
• “Traffic Management at junctions of Taft Avenue using Graph Theory”, (co-authored with L. K. Abanes and J. A. Maniago),
  The Proceedings of the 2017 DLSU Research Congress, De La Salle University
• “A Proposed Algorithm for finding the minimum cost of traveling in the Philippines”, (co-authored with A. E. Cuervas and
  Z. N. Otero), Proceedings of the 2017 DLSU Research Congress, De La Salle University
• “Application of Parametric Bootstrap in Analyzing the Siler Model on Female Mortality of the Philippines”, The
  Proceedings of the 2016 DLSU Research Congress, De La Salle University.
• “Estimation of Mortality of the Philippines and Some Selected Southeast Asian Countries Using the Heligman Polard
  Model” The Proceedings of the 2014 DLSU Research Congress, De La Salle University.
• “The Spectra of the Cartesian Product of Some Special Classes of Assymetric, Circulant and r-regular Digraphs”, Manila
  Journal of Science.Vol. 8, No. 1, 2012.
• “On the Lee-Carter Model as Applied to Mortality Tables of the Baltic States and the Philippines” (co-authored with
  Kristine Mae de la Cruz and Sara Jane de la Cruz) The Proceedings of the De La Salle University- Osaka University
  (DLSU-OU) Academic Research Workshops, Vol. 13, 2010
• “Estimating the Philippine Mortality Table using a Monte Carlo Type Simulation”, (co-authored with A. Ayusa and P.
  Bautista), The Proceedings of the De La Salle University- Osaka University (DLSU-OU) Academic Research Workshops,
  Vol. 11, 2008
• “The Dimension of the join of two graphs” (co-authored with S. Gervacio), Proceedings of the Osaka University-De La
  Salle University (OU-DLSU) Academic Research Workshops, Vol. 7, 2006
• “The Spectra of Some Asymmetric, Circulant and r-regular Digraphs and their Complements”, Manila Journal of Science,
  Vol. 5, No.1, 2002
• “Some Reduction Formulas and the Characterization of Singular and Nonsingular Directed Fans” (co-authored with S.
  Gervacio)., Manila Journal of Science, Vol. 4, No. 2, 2001
• “Singular and Nonsingular Circulant Asymmetric Digraphs” (co-authored with S. Gervacio) . Manila Journal of Science,
  Vol. 3, No. 2, 1999