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Ramanujan's constant is the transcendental number [5], which is an almost integer: [6] = … +. This number was discovered in 1859 by the mathematician Charles Hermite. [7] In a 1975 April Fool article in Scientific American magazine, [8] "Mathematical Games" columnist Martin Gardner made the hoax claim that the number was in fact an integer, and that the Indian mathematical genius Srinivasa ...
For a given cation, Pauling defined [2] the electrostatic bond strength to each coordinated anion as =, where z is the cation charge and ν is the cation coordination number. A stable ionic structure is arranged to preserve local electroneutrality , so that the sum of the strengths of the electrostatic bonds to an anion equals the charge on ...
In number theory, the Heegner theorem [1] establishes the complete list of the quadratic imaginary number fields whose rings of integers are principal ideal domains. It solves a special case of Gauss's class number problem of determining the number of imaginary quadratic fields that have a given fixed class number .
Heegner points are special points on elliptic curves The Stark–Heegner theorem identifies the imaginary quadratic fields of class number 1. A Heegner number is a number n such that Q ( √ − n ) is an imaginary quadratic field of class number 1.
The potentials were developed partly independently of each other, but share the common idea that the strength of a chemical bond depends on the bonding environment, including the number of bonds and possibly also angles and bond lengths. It is based on the Linus Pauling bond order concept [1] [6] and can be written in the form
The quadratic integer ring [] of all complex numbers of the form +, where a and b are integers, is not a UFD because 6 factors as both 2×3 and as (+) (). These truly are different factorizations, because the only units in this ring are 1 and −1; thus, none of 2, 3, 1 + − 5 {\displaystyle 1+{\sqrt {-5}}} , and 1 − − 5 {\displaystyle 1 ...
Yet, clearly the bond angles between all these molecules deviate from their ideal geometries in different ways. Bent's rule can help elucidate these apparent discrepancies. [5] [20] [21] Electronegative substituents will have more p character. [5] [20] Bond angle has a proportional relationship with s character and an inverse relationship with ...
In mathematics, an Euler system is a collection of compatible elements of Galois cohomology groups indexed by fields.They were introduced by Kolyvagin () in his work on Heegner points on modular elliptic curves, which was motivated by his earlier paper Kolyvagin (1988) and the work of Thaine (1988).