Hello Readers Hope you are doing well. Today i am writing a short note on Pseudo-graph. Generally people get confused about the definition of pseudo-graph. Pseudo word refers to spurious i.e. `mithya'. Some authors say that a graph without multiple edges and self-loops is called pseudo-graph while others produce the examples of pseudo-graph as a … Continue reading Pseudo Graph

# Month: March 2017

# Pigeonhole Principle

Hello Readers Hope you are doing well. Today i am writing on very important mathematical tool based on combinatorics that is pigeonhole principle. What actually `Pigeonhole' word refers? It refers to the square boxes or holes utilized to place pigeons in the united states. Inspiring by this concept, a mathematical principle was introduced in 1834 by a … Continue reading Pigeonhole Principle

# Every tree has either one or two center

Every tree has either one or two centers