Relates the product and series representations of the Euler function Π(1-x^n)
In mathematics, Euler's pentagonal number theorem relates the product and series representations of the Euler function. It states that
In other words,
The exponents 1, 2, 5, 7, 12, ... on the right hand side are given by the formula gk = k(3k − 1)/2 for k = 1, −1, 2, −2, 3, ... and are called (generalized) pentagonal numbers (sequence A001318 in the OEIS). (The constant term 1 corresponds to .)
This holds as an identity of convergent power series for , and also as an identity of formal power series.
A striking feature of this formula is the amount of cancellation in the expansion of the product.
and 26 Related for: Pentagonal number theorem information
In mathematics, Euler's pentagonalnumbertheorem relates the product and series representations of the Euler function. It states that ∏ n = 1 ∞ ( 1 −...
involved in the construction of pentagonal numbers are not rotationally symmetrical. The nth pentagonalnumber pn is the number of distinct dots in a pattern...
(triangular numbers) 17 = 16 + 1 (square numbers) 17 = 12 + 5 (pentagonal numbers). The theorem is named after Pierre de Fermat, who stated it, in 1638, without...
(number theory) Integer partition Bell numbers Landau's function Pentagonalnumbertheorem Bell series Lambert series Twin prime Brun's constant Cousin prime...
the partition function. The Euler identity, also known as the Pentagonalnumbertheorem, is ϕ ( q ) = ∑ n = − ∞ ∞ ( − 1 ) n q ( 3 n 2 − n ) / 2 . {\displaystyle...
pentagonal numbers (OEIS: A001318, starting at offset 1). Indeed, Euler proved this by logarithmic differentiation of the identity in his pentagonal number...
four squares. Euler's identity may also refer to the pentagonalnumbertheorem. Euler's number, e = 2.71828..., the base of the natural logarithm Euler's...
formula Ferrers graph Glaisher's theorem Landau's function Partition function (number theory) Pentagonalnumbertheorem Plane partition Quotition and partition...
}^{\infty }(-1)^{n}q^{\frac {3n^{2}-n}{2}}.} Note that by using Euler Pentagonalnumbertheorem for I ( τ ) > 0 {\displaystyle {\mathfrak {I}}(\tau )>0} , the...
proof of a classical result on the number of certain integer partitions. Bijective proofs of the pentagonalnumbertheorem. Bijective proofs of the formula...
corresponding affine Kac–Moody algebra. Jacobi's proof relies on Euler's pentagonalnumbertheorem, which is itself a specific case of the Jacobi Triple Product...
pentagonalnumber and the (3k − 1)th pentatope number is always the ( 3 k 2 + k 2 ) {\displaystyle \left({\tfrac {3k^{2}+k}{2}}\right)} th pentagonal...
In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle...
on 2013-05-29. Retrieved 2010-05-13. Weisstein, Eric W. "Pentagonal Square Triangular Number". MathWorld. The Penguin Dictionary of Curious and Interesting...
summandization of the now mentioned Pochhammer product is described by the Pentagonalnumbertheorem in this way: ( x ; x ) ∞ = 1 + ∑ n = 1 ∞ [ − x Fn ( 2 n − 1 )...
echinoderms with a pentagonal shape. A Ho-Mg-Zn icosahedral quasicrystal formed as a pentagonal dodecahedron. The faces are true regular pentagons. A pyritohedral...
{3j+1}{2}}\right\rceil } denote the sequence of interleaved pentagonal numbers, i.e., so that the pentagonalnumbertheorem is expanded in the form of ( q ; q ) ∞ = ∑...
smaller than 4. Primes are central in number theory because of the fundamental theorem of arithmetic: every natural number greater than 1 is either a prime...
contains a statement of Euler's formula and a statement of the pentagonalnumbertheorem, which he had discovered earlier and would publish a proof for...
certain non-reduced affine root system. It is related to Euler's pentagonalnumbertheorem. ∏ n ≥ 1 ( 1 − s n ) ( 1 − s n t ) ( 1 − s n − 1 t − 1 ) ( 1 −...
first equality. The second equality can be proved by using the pentagonalnumbertheorem. Berndt, Bruce C. (1998). Ramanujan's Notebooks Part V. Springer...
{1}{2}}k(3k-1))+P(n-{\frac {1}{2}}k(3k+1))]} derived from Euler's pentagonalnumbertheorem. Written as a dfn:: §16 pn ← {1≥⍵:0≤⍵ ⋄ -⌿+⌿∇¨rec ⍵} rec ← {⍵...