Hyperbolic Plane
In the hyperbolic plane 
, a pair of Lines can be Parallel (diverging from one anotherin one direction and intersecting at an Ideal Point at infinity in the other), can intersect, or can beHyperparallel (diverge from each other in both directions).
- Exploration Problem
- Exponent
- Exponential Digital Invariant
- Exponential Distribution
- Exponential Divisor
- Exponential Function
- Exponential Function (Truncated)
- Exponential Inequality
- Exponential Integral
- Exponential Map
- Exponential Matrix
- Exponential Ramp
- Exponential Sum Formulas
- Exponential Sum Function
- Exponent Laws
- Exponent Vector
- Exradius
- Exsecant
- Extended Cycloid
- Extended Goldbach Conjecture
- Extended Greatest Common Divisor
- Extended Mean-Value Theorem
- Extended Riemann Hypothesis
- Extension
- Extension Problem