Si-ci-spiral
From Encyclopedia of Mathematics
A plane curve whose equation in rectangular Cartesian coordinates 
has the form
 |
where 
is the integral cosine, 
is the integral sine and 
is a real parameter (see Fig.).
Figure: s084980a
The arc length from 
to 
is equal to 
, and the curvature is equal to 
.
References
| [1] | E. Jahnke, F. Emde, F. Lösch, "Tafeln höheren Funktionen" , Teubner (1966) |
Comments
References
| [a1] | M. Abramowitz, I.A. Stegun, "Handbook of mathematical functions" , Dover, reprint (1972) |
How to Cite This Entry:
Si-ci-spiral. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Si-ci-spiral&oldid=14835
Si-ci-spiral. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Si-ci-spiral&oldid=14835
This article was adapted from an original article by D.D. Sokolov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article