Surgery
In the process of attaching a 
-Handle to a Manifold 
, the Boundary of is modified by a processcalled 
-surgery. Surgery consists of the removal of a Tubular Neighborhood of a -Sphere
from the Boundaries of and the 
standard Sphere, and the gluingtogether of these two scarred-up objects along their common Boundaries.
- 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
- Lam's Problem
- Lamé Curve
- Lamé Function
- Lamé's Differential Equation