Sums of powers

Squares in number theory | Number theory

In mathematics and statistics, sums of powers occur in a number of contexts: * Sums of squares arise in many contexts. For example, in geometry, the Pythagorean theorem involves the sum of two squares; in number theory, there are Legendre's three-square theorem and Jacobi's four-square theorem; and in statistics, the analysis of variance involves summing the squares of quantities. * Faulhaber's formula expresses as a polynomial in n, or alternatively in term of a Bernoulli polynomial. * Fermat's right triangle theorem states that there is no solution in positive integers for and . * Fermat's Last Theorem states that is impossible in positive integers with k>2. * The equation of a superellipse is . The squircle is the case . * Euler's sum of powers conjecture (disproved) concerns situations in which the sum of n integers, each a kth power of an integer, equals another kth power. * The Fermat-Catalan conjecture asks whether there are an infinitude of examples in which the sum of two coprime integers, each a power of an integer, with the powers not necessarily equal, can equal another integer that is a power, with the reciprocals of the three powers summing to less than 1. * Beal's conjecture concerns the question of whether the sum of two coprime integers, each a power greater than 2 of an integer, with the powers not necessarily equal, can equal another integer that is a power greater than 2. * The Jacobi–Madden equation is in integers. * The Prouhet–Tarry–Escott problem considers sums of two sets of kth powers of integers that are equal for multiple values of k. * A taxicab number is the smallest integer that can be expressed as a sum of two positive third powers in n distinct ways. * The Riemann zeta function is the sum of the reciprocals of the positive integers each raised to the power s, where s is a complex number whose real part is greater than 1. * The Lander, Parkin, and Selfridge conjecture concerns the minimal value of m + n in * Waring's problem asks whether for every natural number k there exists an associated positive integer s such that every natural number is the sum of at most s kth powers of natural numbers. * The successive powers of the golden ratio φ obey the Fibonacci recurrence: * Newton's identities express the sum of the kth powers of all the roots of a polynomial in terms of the coefficients in the polynomial. * The sum of cubes of numbers in arithmetic progression is sometimes another cube. * The Fermat cubic, in which the sum of three cubes equals another cube, has a general solution. * The power sum symmetric polynomial is a building block for symmetric polynomials. * The sum of the reciprocals of all perfect powers including duplicates (but not including 1) equals 1. * The Erdős–Moser equation, where and are positive integers, is conjectured to have no solutions other than 11 + 21 = 31. * The sums of three cubes cannot equal 4 or 5 modulo 9, but it is unknown whether all remaining integers can be expressed in this form. * The sums of powers Sm(z, n) = zm + (z+1)m + ... + (z+n−1)m is related to the Bernoulli polynomials Bm(z) by (∂n−∂z) Sm(z, n) = Bm(z) and (∂2λ−∂Z) S2k+1(z, n) = Ŝ′k+1(Z) where Z = z(z−1), λ = S1(z, n), Ŝk+1(Z) ≡ S2k+1(0, z). * The sum of the terms in the geometric series is (Wikipedia).

Powers

"Understand power notation and calculate simple powers, e.g. squares, cubes."

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From playlist Precalculus and Algebra

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From playlist Seminar Series "Arithmetic Applications of Fourier Analysis"

power series solutions to 1st and 2nd order equations -- differential equations 16

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From playlist Differential Equations

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Sums of powers

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