Tiling Rectangles with Gaps by Ribbon Right Trominoes
Premalatha Junius, Viorel Nitica

Pub. Date: April 30, 2017   DOI: 10.4236/ojdm.2017.72010

The Spread of Infectious Disease on Network Using Neutrosophic Algebraic Structure
A. Zubairu, A. A. Ibrahim

Pub. Date: April 24, 2017   DOI: 10.4236/ojdm.2017.72009

Boundaries of Smooth Strictly Convex Sets in the Euclidean Plane R²
Horst Kramer

Pub. Date: April 19, 2017   DOI: 10.4236/ojdm.2017.72008

Length of the Longest Path and Diameter in Orientations of Graphs
Bing Zhou

Pub. Date: April 19, 2017   DOI: 10.4236/ojdm.2017.72007

Competition Numbers of Several Kinds of Triangulations of a Sphere
Yongqiang Zhao, Zhiming Fang, Yonggang Cui, Guoyan Ye, Zhijun Cao

Pub. Date: April 19, 2017   DOI: 10.4236/ojdm.2017.72006