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Problems on the surface of a sphere offer an entertaining introduction to point sets 1973 Oct "Look-see" diagrams that offer visual proof of complex algebraic formulas: 1973 Nov: Fantastic patterns traced by programmed "worms" 1973 Dec: On expressing integers as the sum of cubes and other unsolved number-theory problems 1974 Jan
Consecutive fifths were usually considered forbidden, even if disguised (such as in a "horn fifth") or broken up by an intervening note (such as the mediant in a triad). [ clarification needed ] The interval may form part of a chord of any number of notes, and may be set well apart from the rest of the harmony , or finely interwoven in its midst.
In number theory, primes in arithmetic progression are any sequence of at least three prime numbers that are consecutive terms in an arithmetic progression. An example is the sequence of primes (3, 7, 11), which is given by a n = 3 + 4 n {\displaystyle a_{n}=3+4n} for 0 ≤ n ≤ 2 {\displaystyle 0\leq n\leq 2} .
The Pell solution (19,6) leads to the pair of consecutive P-smooth numbers ; the other two solutions to the Pell equation do not lead to P-smooth pairs. For q = 6, the first three solutions to the Pell equation x 2 − 12y 2 = 1 are (7,2), (97,28), and (1351,390). The Pell solution (7,2) leads to the pair of consecutive P-smooth numbers .
Landau's fourth problem asked whether there are infinitely many primes which are of the form = + for integer n. (The list of known primes of this form is A002496 .) The existence of infinitely many such primes would follow as a consequence of other number-theoretic conjectures such as the Bunyakovsky conjecture and Bateman–Horn conjecture .
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
Numbers of the form 31·16 n always require 16 fourth powers. 68 578 904 422 is the last known number that requires 9 fifth powers (Integer sequence S001057, Tony D. Noe, Jul 04 2017), 617 597 724 is the last number less than 1.3 × 10 9 that requires 10 fifth powers, and 51 033 617 is the last number less than 1.3 × 10 9 that requires 11.
It is an open problem whether in this case the winning probability tends to zero with growing number of team members. [ 4 ] In 2005, Navin Goyal and Michael Saks developed a strategy for team B based on the cycle-following strategy for a more general problem in which the fraction of empty boxes as well as the fraction of boxes each team member ...