real number
quantity along a continuous line
Brun's constant
sum of reciprocals of twin primes
Stephens' constant
mathematical constant related to the primes
pi
constant ratio of the circumference of a circle to its diameter
Hermite constant
constant relating to close packing of spheres
Laplace limit
maximum eccentricity for which a power series for Kepler's equation converges
Graham's number
enormously large number, the upper bound solution to a Ramsey theory problem
rational number
quotient of two integers
almost integer
any number that is not an integer but is very close to one
reciprocal Fibonacci constant
real number, approximately 3.36, the sum of the reciprocals of the Fibonacci numbers
Lieb's square ice constant
mathematical constant used in combinatorics
Feigenbaum constants
mathematical constants
Bernstein's constant
mathematical constant
definable real number
real number uniquely specified by description
Fission product yield
fraction of a fission product produced per fission
illegal number
a number that represents information which is illegal in some legal jurisdiction
number with infinite decimal representation
number whose decimal digits go on forever
non-negative real number
real number greater than or equal to zero
decimal number
number written in decimal notation, although it is more commonly used to refer to numbers that have a fractional part separated from the integer part with a decimal separator (e.g. 11.25)
conic constant
quantity describing conic sections
tau
ratio of the circumference of a circle to its radius
Seshadri constant
invariant of an ample line bundle L at a point P on an algebraic variety
irrational number
real number that cannot be expressed as a ratio of integers
Catalan's constant
value of the Dirichlet beta function with two as the argument
Mills' constant
prime-generating mathematical constant
constructible number
real number that can be geometrically constructed with compass and straightedge from a unit segment in a finite number of steps
i^i
the exponential of the imaginary unit i by itself
one and a half
numeral for 1.5
Dottie number
mathematical constant related to the cosine function