- tetrahedral number
- мат. тетраэдральное число
Большой англо-русский и русско-английский словарь. 2001.
tetrahedral number
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Tetrahedral number — A pyramid with side length 5 contains 35 spheres. Each layer represents one of the first five triangular numbers. A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and… … Wikipedia
number symbolism — Introduction cultural associations, including religious, philosophic, and aesthetic, with various numbers. Humanity has had a love hate relationship with numbers from the earliest times. Bones dating from perhaps 30,000 years ago show … Universalium
10000 (number) — Number number = 10000 prev = 9999 next = 100000 range = 10000 100000 cardinal = 10000 ordinal = th ordinal text = ten thousandth numeral = decamillesimal factorization = 2^4 cdot 5^4 prime = divisor = roman = overline|X unicode = overline|X, ↂ… … 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
1000 (number) — List of numbers Integers ← 1k 2k 3k 4k 5k 6k 7k 8k 9k → Cardinal 1000 one thousand … Wikipedia
2000 (number) — 2000 (two thousand) is the natural number following 1999 and preceding 2001.See also: millennium, year 2000 AD, Y2K, 2000 (disambiguation).Two thousand is the highest number expressible using only two unmodified characters in roman numerals… … Wikipedia
Square pyramidal number — In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. These numbers can be expressed in a formula as:sum {k=1}^nk^2={n(n + 1)(2n + 1) over 6}={2n^3 + 3n^2 + n over … Wikipedia
4000 (number) — 4000 (four thousand) is the natural number following 3999 and preceding 4001. It is a decagonal number. Selected numbers in the range 4001 4999 * 4005 triangular number * 4007 safe prime * 4010 magic constant of n times; n normal magic square and … Wikipedia
Octahedral number — 146 magnetic balls, packed in the form of an octahedron In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close packed spheres. The nth octahedral number On can be… … Wikipedia
3000 (number) — 3000 (three thousand) is the natural number following 2999 and preceding 3001. It is the smallest number requiring thirteen letters in English (when and is required from 101 forward). In other fields In the novel The Brothers Karamazov by Fyodor… … Wikipedia
5000 (number) — 5000 (five thousand) is the natural number following 4999 and preceding 5001. Five thousand is the largest isogrammic number in the English language. Selected numbers in the range 5001 5999 * 5003 Sophie Germain prime * 5020 amicable number with… … Wikipedia
