en.wikipedia.org/wiki/Number

A number is a mathematical object used to count, measure, and label. The
original examples ... For example, in Western society the number 13 is regarded
as unlucky, and "a ... Today, number sys...

mathforum.org/library/drmath/sets/select/dm_imaginary.html

Imaginary Numbers in Real Life, a selection of answers from the Dr. Math ... of
Imaginary Numbers: Where are imaginary numbers used today in real life, as in ...

www.regentsprep.org/Regents/math/algtrig/ATO6/electricalresouce.htm

Surprise! Complex numbers are not just a "math oddity" that only we crazy
mathematicians enjoy. Since complex numbers provide a system for finding the
roots ...

plus.maths.org/content/101-uses-quadratic-equation-part-ii

May 1, 2004 ... Differential equations are at the heart of nearly all modern ... and this is the
approach generally used for the very complex differential equations .... Using a
combination of real and imaginary numbers, known as complex ...

www.dpmms.cam.ac.uk/~wtg10/reals.html

A dialogue concerning the need for the real number system. ... rationals, reals,
complex numbers) the biggest jump in sophistication is that between Q ... S. I was
looking at a maths book today and saw a whole lot of complicated stuff ..... own
are a bit restrictive because there are plenty of useful numbers such as root two, ...

www.britannica.com/topic/modern-algebra

Modern algebra, also called abstract algebra, branch of mathematics ... However,
when a set has one or more operations (such as addition and multiplication)
defined for its elements, it becomes very useful. .... In The News / Society ... (An
algebraic integer is a complex number satisfying an algebraic equation of the
form x <sup>n</sup> ...

www.livescience.com/38936-mathematics.html

Aug 15, 2013 ... The more complex a society, the more complex the mathematical needs. ...
Mathematicians in ancient times also began to look at number theory. ... In a
modern world, math such as applied mathematics is not only relevant, ...

www.commsp.ee.ic.ac.uk/~mandic/complexbook/files/c01.pdf

The notion of complex number is intimately related to the Fundamental Theorem
of Algebra ... The human idea of 'number' has evolved together with human
society. ... N) are straightforward to accept, and they have been used for counting
in many ... mathematicians were working on what is today known as the
Fundamental ...

galileospendulum.org/2012/06/09/imaginary-numbers-are-real/

Jun 9, 2012 ... Imaginary and complex numbers are handicapped by the name we gave them. ...
made up, perhaps not useful; "complex" similarly seems to argue the numbers
are too hard to use. ... In fact, today is the birthday of mathematician Caspar
Wessel who characterized the complex plane. .... Science and Society.

www.maa.org/external_archive/devlin/devlin_0708_08.html

What worried me were some blog entries and a number of emails I received ...
the more basic, earlier method, that people used for hundreds of years, and then
... as repeated addition (though I suspect not), but in today's world, that is
definitely not ... is no way they can lead informed lives and contribute adequately
to society.