Encyclopedia > Envelopes

Article Content

Envelope

Redirected from Envelopes

An envelope is a container used for sending mail (letters) through the postal system.
An envelope is a mathematical curve tangent to a family of lines.
An envelope is a curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

... x + \frac{c}{a}=0 </math> which is equivalent to <math>x^2+\frac{b}{a}x=-\frac{c}{a}.</math> The equation is now in a form in which we ca ...