Moore Graph
A Graph with Diameter 
and Girth 
. Moore graphs have Diameterof at most 2. Every Moore graph is both Regular and distance regular. Hoffman and Singleton (1960)show that 
-regular Moore graphs with Diameter 2 have 
.
References
Godsil, C. D. ``Problems in Algebraic Combinatorics.'' Electronic J. Combinatorics 2, F1 1-20, 1995.http://www.combinatorics.org/Volume_2/volume2.html#F1. Hoffman, A. J. and Singleton, R. R. ``On Moore Graphs of Diameter Two and Three.'' IBM J. Res. Develop. 4, 497-504, 1960.
- Lagrange Spectrum
- Lagrangian Coefficient
- Lagrangian Derivative
- Laguerre Differential Equation
- Laguerre-Gauss Quadrature
- Laguerre Polynomial
- Laguerre Quadrature
- Laguerre's Method
- Laguerre's Repeated Fraction
- Laisant's Recurrence Formula
- Lakshmi Star
- Lal's Constant
- Laman's Theorem
- Lambda Calculus
- Lambda Function
- Lambda Group
- Lambda Hypergeometric Function
- Lambert Azimuthal Equal-Area Projection
- Lambert Conformal Conic Projection
- Lambert Series
- Lambert's Method
- Lambert's Transcendental Equation
- Lambert's W-Function
- Lamina
- Laminated Lattice