On the Number of Idempotent Partial Contraction Mappings of a Finite Chain
Oladapo Adekunle Ojo, Fatma Salim Ali Al-Kharousi, Abdullahi Umar

Open J. Discrete Math. Vol.11 No.3, July 13, 2021
DOI:10.4236/ojdm.2021.113007

Markov Models for the Tipsy Cop and Robber Game on Graph
Viktoriya Bardenova, Vincent Ciarcia, Erik Insko

Open J. Discrete Math. Vol.11 No.3, July 12, 2021
DOI:10.4236/ojdm.2021.113006

A Note on n-Set Distance-Labelings of Graphs
Roger K. Yeh

Open J. Discrete Math. Vol.11 No.3, June 08, 2021
DOI:10.4236/ojdm.2021.113005