News tagged with number
Scientists find first evidence that many universes exist
(PhysOrg.com) -- By looking far out into space and observing what’s going on there, scientists have been led to theorize that it all started with a Big Bang, immediately followed by a brief period of ...
Dec 17, 2010 |
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New math theories reveal the nature of numbers
For centuries, some of the greatest names in math have tried to make sense of partition numbers, the basis for adding and counting. Many mathematicians added major pieces to the puzzle, but all of them fell ...
Jan 20, 2011 |
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Time likely to end within 5 billion years, physicists calculate
(PhysOrg.com) -- As far as astrophysicists can tell, the universe is expanding at an accelerating rate, and will likely continue to do so indefinitely. But now some physicists are saying that this theory, ...
Oct 01, 2010 |
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Pasta-shaped radio waves beamed across Venice
A group of Italian and Swedish researchers appears to have solved the problem of radio congestion by cleverly twisting radio waves into the shape of fusilli pasta, allowing a potentially infinite number of channels to be ...
Mar 02, 2012 |
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Periodic table of shapes to give a new dimension to maths (w/ Video)
(PhysOrg.com) -- Mathematicians are creating their own version of the periodic table that will provide a vast directory of all the possible shapes in the universe across three, four and five dimensions, linking ...
Feb 16, 2011 |
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The 'Magic' of Tin
(PhysOrg.com) -- The metal tin lacks the value and prestige of gold, silver, and platinum -- but to nuclear physicists, tin is magic.
Aug 06, 2010 |
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Random, but not by chance: A quantum random-number generator for encryption, security
Researchers have devised a new kind of random number generator, for encrypted communications and other uses, that is cryptographically secure, inherently private and - most importantly - certified random by ...
Apr 14, 2010 |
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Random numbers game with quantum dice
(PhysOrg.com) -- A simple device measures the quantum noise of vacuum fluctuations and generates true random numbers.
Sep 09, 2010 |
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Math ability is inborn
We accept that some people are born with a talent for music or art or athletics. But what about mathematics? Do some of us just arrive in the world with better math skills than others?
Aug 08, 2011 |
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Hackers hitting Macs with virus: industry experts
The computer security industry buzzed Thursday with warnings that more than a half-million Macintosh computers may have been infected with a virus targeting Apple machines.
Apr 05, 2012 |
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Researchers show how to use mobiles to spy on people
(PhysOrg.com) -- Researchers have demonstrated how it is possible to use GSM (Global System for Mobile communications) data along with a few tools to track down a person’s mobile phone number and their location, ...
Apr 22, 2010 |
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The sum of digits of prime numbers is evenly distributed
(PhysOrg.com) -- On average, there are as many prime numbers for which the sum of decimal digits is even as prime numbers for which it is odd. This hypothesis, first made in 1968, has recently been proven by French researchers ...
May 12, 2010 |
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Words help people form mathematical concepts (w/ Video)
(PhysOrg.com) -- Language may play an important role in learning the meanings of numbers, scholars at the University of Chicago report.
Medicine & Health / Psychology & Psychiatry
Feb 07, 2011 |
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New algorithm provides new insights into evolutionary exodus out of Africa
Researchers have probed deeper into human evolution by developing an elegant new technique to analyse whole genomes from different populations. One key finding from the Wellcome Trust Sanger Institute's study is that African ...
Jul 13, 2011 |
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Quarks 'swing' to the tones of random numbers
At the Large Hadron Collider at CERN protons crash into each other at incredibly high energies in order to 'smash' the protons and to study the elementary particles of nature - including quarks. Quarks are ...
Sep 27, 2010 |
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Number
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 numbers, irrational numbers, and complex numbers.
Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.
A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).
In common use, the word number can mean the abstract object, the symbol, or the word for the number.
For more information about Number, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
