easy question: what's the wavelet?

hello guys. i have a simple question about the word "wavelet"
i have heard this word very much but i really don't know what it means?
please explain it for me;
what is it?
when does it use?
how can i find some information about it?
thank's.

M-arsh.

A transformation series like Fourier Series.

it major benefit is the ability giving the frequency and time information.
Like shorten time-frequency Fourier Series.

is there any "introduction to wavelet" in WWW?

i'd like to learn more about it.

try this links and att.

http://www.amazon.com/gp/product/012...lance&n=283155

http://www.amara.com/IEEEwave/IEEEwavelet.html