Chebyshev-Sylvester Constant
In 1891, Chebyshev and Sylvester showed that for sufficiently large 
, there exists at least one prime number 
satisfying
where
. Since the Prime Number Theorem shows the above inequality is true for all 
for sufficiently large , this constant is only of historical interest.
References
Le Lionnais, F. Les nombres remarquables. Paris: Hermann, p. 22, 1983.
- Hypermatrix
- Hyperparallel
- Hyperperfect Number
- Hyperplane
- Hyperreal Number
- Hyperspace
- Hypersphere
- Hypersphere Packing
- Hypervolume
- Hypocycloid
- Hypocycloid--3-Cusped
- Hypocycloid--4-Cusped
- Hypocycloid Evolute
- Hypocycloid Involute
- Hypocycloid Pedal Curve
- Hypoellipse
- Hypotenuse
- Hypothesis
- Hypothesis Testing
- Hypotrochoid
- Hypotrochoid Evolute
- Hyzer's Illusion
- Hénon Attractor
- Hénon-Heiles Equation
- Hénon Map