Department of Mathematics

[Member-Image]

Dr. K.D. Eranda Dhananjaya

Lecturer (Probationary)

B.Sc. (Perad.), M.Sc. (NCHU), Ph.D. (NCHU)

About Me

I am K. D. Eranda Dhananjaya, a researcher in graph theory, with primary research interests in antimagic labelling and antimagic orientations of graphs. I completed my Ph.D. in Mathematics and earned my Master’s degree from National Chung Hsing University (NCHU), Taiwan. I obtained my Bachelor of Science degree from the University of Peradeniya, Sri Lanka, specializing in Mathematics, and I am currently affiliated with the Department of Mathematics, University of Peradeniya, Sri Lanka. I am interested in collaborative research and working with motivated undergraduate and postgraduate students in graph theory and combinatorics, particularly graph labelling, graph colouring, and Ramsey theory. Please feel free to contact me via email(dhananjayae@sci.pdn.ac.lk) for further information.

Contact Details

Positions Held

Member of the Faculty Web Committee- (2015-Present)

Graduate Teaching Assistant Teaching Assistant, Department of Applied Mathematics, National Chung Hsing University, Taiwan- (2019-2025)

Research Assistant, Department of Applied Mathematics, National Chung Hsing University, Taiwan- (2019-2025)

Visiting Lecturer, Open University, Sri Lanka- (2017-2019)

Lecturer (Probationary), Department of Mathematics, University of Peradeniya, Sri Lanka- (2017-Present)

Visiting Lecturer, Faculty of Allied Health Sciences, University of Peradeniya, Sri Lanka- (2018-2019)

Visiting Lecturer, Faculty of Arts, University of Peradeniya, Sri Lanka- (2018-2019)

Temporary Lecturer, Department of Mathematics, University of Peradeniya, Sri Lanka - (2016-2017)

Temporary Demonstrator, Department of Mathematics, University of Peradeniya, Sri Lanka. - (2015-2016)

Ongoing Research and Projects

Local antimagic orientations of graphs,

I am currently engaged in research on antimagic and local antimagic orientations of graphs, with a particular focus on the local antimagic orientation chromatic number. My work involves developing constructive labeling and orientation techniques, studying the effects of graph operations, and identifying structural properties that influence vertex sum distributions. This research aims to advance theoretical understanding in graph labeling theory and contribute new results to combinatorics and discrete mathematics.

Graceful labeling of spider graphs

I am also working on graceful labeling of spider graphs, focusing on the existence and construction of graceful labelings for different classes of spiders. This research explores structural conditions and labeling strategies that ensure graceful properties, contributing to broader developments in graph labeling theory.

Analyzing b-color local edge antimagic coloring in graphs

Awards, Scholarships, Memberships & Fellowships

University Award for Academic Excellence in 2015.

Best Dissertation Award/Combinatorial Mathematics New Seed Workshop-2025

Sing-Li Lecture Science Award(Academic Excellence)/National Chung Hsing University-2023

Sing-Li Lecture Science Award(Academic Excellence)/National Chung Hsing University-2021

Graduate academic Award/ National Chung Hsing University 2020-2025

The Phi Tau Phi Scholastic Honor Society Honorary Membership

Taiwan Scholarship

NCHU Elite Scholarship

Member of the Art Circle, Faculty of Science

President of the Mathematical Society Faculty of Science 2012-2013

Member of the “SAHODARA PIYAPATH “ Society, Faculty of Science

My Teachings

MAT1032: Differential Equations

MAT1212: Mathematics for Arts/Commerce I

MAT2092: Graph Theory

MAT3023: Real Analysis III

MAT3032: Convex Analysis

MAT3063: Topology I

My Publications

2025 1 2017 3

Taiwanese Journal of Mathematics

Wei-Tian Li (2025). The Antimagic Orientations for Graphs Obtained by Some Graph Operations. Taiwanese Journal of Mathematics, 29: 687-703.

American Journal of Engineering Research (AJER)

K. D. E. Dhananjaya, A. A. I. Perera, W. V. Nishadi, D. Uththmawadu (2017). An Algorithm to Construct Symmetric Latin Squares of Order qⁿ for q>=2 and n >=1,. American Journal of Engineering Research (AJER), Volume-6, Issue-2,: pp-42-50: e-ISSN: 2320-0847 p-ISSN : 23200936.

Peradeniya University International Research Sessions- iPURSE

K. D. E Dhananjaya ,W.V.Nishadi, , A. A. I. Perera, (2017). An Algorithm to Construct Factors of a Complete Graph of Even number of Vertices,. Peradeniya University International Research Sessions- iPURSE, ( Abstract No 245).

Peradeniya University International Research Sessions- iPURSE 2017

J.W.E.W. De Silva, K.D.E. Dhananjaya, J. A. Weliwita (2017). A NUMERICAL STUDY ON VISCOUS FLOW PAST TWO ADJACENT. ELLIPTIC CYLINDERS. Peradeniya University International Research Sessions- iPURSE 2017, ( Abstract No 286).

Conferences

There's nothing to display under this subheading !!!
Please Update

Research Interests (Research Fields/ Projects)

Graph theory/ Combinotorics

Higher Education Qualifications

PhD
National Chung Hsing University - Taiwan (2025)

MSc
National Chung Hsing University - Taiwan (2021)

BSc
University of Peradeniya - Sri Lanka (2015)

Key Publications

American Journal of Engineering Research (AJER) - (2017)

An Algorithm to Construct Symmetric Latin Squares of Order qⁿ for q>=2 and n >=1,