Business

Apple's revenue, profit top analyst views in latest quarter

Apple on Thursday reported quarterly results that topped analysts' profit projections despite supply shortages, economic fallout from the Russia-Ukraine war and a growth slowdown from the huge sales lift that technology products ...

Security

COVID tests may leak personal data

Last year, over 14 million PCR tests were performed in Sweden. Researchers at Umeå University have discovered that personal data has been exposed by a private company handling test certificates. "This is something that may ...

Business

Telenor Myanmar sale challenged over data leak fears

The proposed sale of Norwegian telecoms giant Telenor's Myanmar subsidiary could put sensitive personal data of millions of customers into the hands of the junta, according to a complaint filed on Tuesday.

Machine learning & AI

Physical systems perform machine-learning computations

You may not be able to teach an old dog new tricks, but Cornell researchers have found a way to train physical systems, ranging from computer speakers and lasers to simple electronic circuits, to perform machine-learning ...

page 2 from 17

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.

This text uses material from Wikipedia, licensed under CC BY-SA