- odd integers
- • нечетно цяло число
English-Bulgarian polytechnical dictionary . 2013.
English-Bulgarian polytechnical dictionary . 2013.
Odd greedy expansion — In number theory, the odd greedy expansion problem concerns a method for forming Egyptian fractions in which all denominators are odd. If a rational number x/y is a sum of odd unit fractions, then y must be odd. Conversely, it is known that… … Wikipedia
odd — adjective Etymology: Middle English odde, from Old Norse oddi point of land, triangle, odd number; akin to Old English ord point of a weapon Date: 14th century 1. a. being without a corresponding mate < an odd shoe > b. (1) left over after others … New Collegiate Dictionary
Multiplicative group of integers modulo n — In modular arithmetic the set of congruence classes relatively prime to the modulus n form a group under multiplication called the multiplicative group of integers modulo n. It is also called the group of primitive residue classes modulo n. In… … Wikipedia
Even and odd permutations — In mathematics, the permutations of a finite set (i.e. the bijective mappings from the set to itself) fall into two classes of equal size: the even permutations and the odd permutations. The parity (oddness or evenness) of a permutation sigma of… … Wikipedia
Even and odd ordinals — In mathematics, even and odd ordinals extend the concept of parity from the natural numbers to the ordinal numbers. They are useful in some transfinite induction proofs. The literature contains a few equivalent definitions of the parity of an… … Wikipedia
Evenness of zero — The number 0 is even. There are several ways to determine whether an integer is even or odd, all of which indicate that 0 is an even number: it is a multiple of 2, it is evenly divisible by 2, it is surrounded on both sides by odd integers, and… … Wikipedia
Bernoulli number — In mathematics, the Bernoulli numbers Bn are a sequence of rational numbers with deep connections to number theory. They are closely related to the values of the Riemann zeta function at negative integers. There are several conventions for… … Wikipedia
Collatz conjecture — Directed graph showing the orbits of small numbers under the Collatz map. The Collatz conjecture is equivalent to the statement that all paths eventually lead to 1 … Wikipedia
Factorial — n n! 0 1 1 1 2 2 3 6 4 24 5 120 6 720 7 … Wikipedia
combinatorics — /keuhm buy neuh tawr iks, tor , kom beuh /, n. (used with singular v.) See combinatorial analysis. * * * Branch of mathematics concerned with the selection, arrangement, and combination of objects chosen from a finite set. The number of possible… … Universalium
Zeta constant — In mathematics, a zeta constant is a number obtained by plugging an integer into the Riemann zeta function. This article provides a number of series identities for the zeta function for integer values.The Riemann zeta function at 0 and 1At zero,… … Wikipedia