Frequency Curve

Cartesian equation:
y = √(2π) exp(-x2/2)


Click below to see one of the Associated curves.

Definitions of the Associated curves Evolute
Involute 1 Involute 2
Inverse curve wrt origin Inverse wrt another circle
Pedal curve wrt origin Pedal wrt another point
Negative pedal curve wrt origin Negative pedal wrt another point
Caustic wrt horizontal rays Caustic curve wrt another point


If your browser can handle JAVA code, click HERE to experiment interactively with this curve and its associated curves.

This curve, the normal curve of error, originated with de Moivre in 1733. It was also studied with Laplace and Gauss.

The name frequency curve also applies to a great variety of other curves.


Main index Famous curves index
Previous curve Next curve
Biographical Index Timelines
History Topics Index Birthplace Maps
Mathematicians of the day Anniversaries for the year
Societies, honours, etc Search Form

JOC/EFR/BS January 1997

The URL of this page is:
http://www-history.mcs.st-andrews.ac.uk/Curves/Frequency.html