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A property of weird numbers is that if n is weird, and p is a prime greater than the sum of divisors σ(n), then pn is also weird. [4] This leads to the definition of primitive weird numbers: weird numbers that are not a multiple of other weird numbers (sequence A002975 in the OEIS). Among the 1765 weird numbers less than one million, there are ...
How to square the circle for real. Spaghetti sort: An algorithm for sorting rods of spaghetti. Squircle: Not quite a square, not quite a circle, definitely not a Pokémon either. Taxicab number: Never tell a Numberphile that a number is uninteresting. Tetraphobia: Sometimes found in conjunction with triskaidekaphobia (see below) in East Asian ...
A visualization of the surreal number tree. In mathematics, the surreal number system is a totally ordered proper class containing not only the real numbers but also infinite and infinitesimal numbers, respectively larger or smaller in absolute value than any positive real number.
In abstract algebra, the superreal numbers are a class of extensions of the real numbers, introduced by H. Garth Dales and W. Hugh Woodin as a generalization of the hyperreal numbers and primarily of interest in non-standard analysis, model theory, and the study of Banach algebras. The field of superreals is itself a subfield of the surreal ...
Numbers very close to, but below one are often expressed in "nines" (N – not to be confused with the unit newton), that is in the number of nines following the decimal separator in writing the number in question. For example, "three nines" or "3N" indicates 0.999 or 99.9%, "four nines five" or "4N5" is the expression for the number 0.99995 or ...
Real Monsters Cookie Jar Yesterday At An Estate Sale And It Has To Be In Contention For Coolest Ever! Image credits: ThriftStore and GoodwillFind #27 My Delightful $1.99 Chili Pepper Couple From ...
Demonstration, with Cuisenaire rods, that the number 10 is an unusual number, its largest prime factor being 5, which is greater than √10 ≈ 3.16 In number theory , an unusual number is a natural number n whose largest prime factor is strictly greater than n {\displaystyle {\sqrt {n}}} .
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