Regular Ring
In the sense of von Neumann, 
a regular ring is a Ring 
such that for all 
, there exists a 
satisfying 
.
References
Jacobson, N. Basic Algebra II, 2nd ed. New York: W. H. Freeman, p. 196, 1989.
- Extent
- Exterior
- Exterior Algebra
- Exterior Angle Bisector
- Exterior Angle Theorem
- Exterior Derivative
- Exterior Dimension
- Exterior Product
- Exterior Snowflake
- Extrapolation
- Extra Strong Lucas Pseudoprime
- Extremal Coloring
- Extremal Graph
- Extremals
- Extreme and Mean Ratio
- Extreme Value Distribution
- Extreme Value Theorem
- Extremum
- Extremum Test
- Extrinsic Curvature
- Fabry Imbedding
- Face
- Facet
- Faceting
- Factor