TOPICS

Algebra Applied Mathematics Calculus and Analysis Discrete Mathematics Foundations of Mathematics Geometry History and Terminology Number Theory Probability and Statistics Recreational Mathematics Topology

Alphabetical Index New in MathWorld

Discrete Mathematics
Graph Theory
Simple Graphs

Two-Regular Graphs

Cycle Graph
Square Graph
Triangle Graph
Two-Regular Graph

About MathWorld
MathWorld Classroom
Contribute
MathWorld Book
wolfram.com

17,068 Entries
Last Updated: Mon Oct 26 2026
©1999–2026 Wolfram Research, Inc.
Terms of Use

wolfram.com
Wolfram for Education
Created, developed and nurtured by Eric Weisstein at Wolfram Research

Created, developed and nurtured by Eric Weisstein at Wolfram Research