integer ac liber/de

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• Fibonacci number — A tiling with squares whose sides are successive Fibonacci numbers in length …   Wikipedia

• Multiplication algorithm — A multiplication algorithm is an algorithm (or method) to multiply two numbers. Depending on the size of the numbers, different algorithms are in use. Efficient multiplication algorithms have existed since the advent of the decimal system.… …   Wikipedia

• Chinese remainder theorem — The Chinese remainder theorem is a result about congruences in number theory and its generalizations in abstract algebra. In its most basic form it concerned with determining n, given the remainders generated by division of n by several numbers.… …   Wikipedia

• Greedy algorithm for Egyptian fractions — In mathematics, an Egyptian fraction is a representation of an irreducible fraction as a sum of unit fractions, as e.g. 5/6 = 1/2 + 1/3. As the name indicates, these representations have been used as long ago as ancient Egypt, but the first… …   Wikipedia

• Practical number — In mathematics, and in particular number theory, a practical number or panarithmic number is a positive integer n such that all smaller positive integers can be represented as sums of distinct divisors of n . For example, 12 is a practical number …   Wikipedia

• Number — For other uses, see Numbers (disambiguation). A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational… …   Wikipedia

• Napier's bones — Computing devices in Rabdology Napier s bones Promptuary …   Wikipedia

• Numerical digit — The ten digits of the Arabic numerals, in order of value. A digit is a symbol (a numeral symbol such as 3 or 7 ) used in combinations (such as 37 ) to represent numbers in positional numeral systems. The name digit comes from the fact that the 10 …   Wikipedia

• number game — Introduction       any of various puzzles and games that involve aspects of mathematics.       Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …   Universalium

• Merkwürdige Zahl — Eine natürliche Zahl wird vollkommene Zahl (auch perfekte Zahl) genannt, wenn sie genauso groß ist wie die Summe ihrer positiven echten Teiler (d. h. aller Teiler außer sich selbst). Ist diese Summe der Teiler kleiner als die Zahl selbst, heißt… …   Deutsch Wikipedia

• Perfekte Zahl — Eine natürliche Zahl wird vollkommene Zahl (auch perfekte Zahl) genannt, wenn sie genauso groß ist wie die Summe ihrer positiven echten Teiler (d. h. aller Teiler außer sich selbst). Ist diese Summe der Teiler kleiner als die Zahl selbst, heißt… …   Deutsch Wikipedia