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Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.
A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.
Examples Complex numbers. Transcendental numbers containing only 3s and 7s in their hexadecimal representations. The questions to ask are: Have professional mathematicians published papers on this kind of number, or chapters in a book, or an entire book about this kind of number? Do MathWorld or PlanetMath have articles on this kind of number?
For example, the constant π may be defined as the ratio of the length of a circle's circumference to its diameter. The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set.
Chinese numerals – Characters used to denote numbers in Chinese Counting rods – Small bars used for calculating in ancient East Asia; Cyrillic numerals – Numeral system derived from the Cyrillic script; Greek numerals – System of writing numbers using Greek letters Attic numerals – Symbolic number notation used by the ancient Greeks
The naming procedure for large numbers is based on taking the number n occurring in 10 3n+3 (short scale) or 10 6n (long scale) and concatenating Latin roots for its units, tens, and hundreds place, together with the suffix -illion. In this way, numbers up to 10 3·999+3 = 10 3000 (short scale) or 10 6·999 = 10 5994 (long scale
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The Infobox — added at the top of the page using the template {{Infobox number}} — should include the symbol of the number in all known numeral systems for which Unicode characters exist, as long as it fits within a reasonable amount of space (examples include Egyptian, Roman, Tamil, Cyrillic, and Burmese; refer to the Infobox at the article for 1 for an example with relevant Wiki markup).