Various properties of finite iterations of the Lévy C curve, including coordinates, boundary, area, squares, centroid, moment of inertia, and weight in regions.

Read draft 4,

- PDF
`c-curve.pdf`

(about 907k, 68 pages) - LaTeX source
`c-curve-4.tar.gz`

(about 861k, and sig)

Also by plain HTTP or by FTP or by RSYNC if desired. The sig file is a Gnu PG ascii armoured signature generated from my key.

"Draft" here means believed correct as far as it goes but more material to be added. The LaTeX source uses PGF for the pictures.

Document copyright 2015, 2016, 2017, 2018 Kevin Ryde. Permission is granted for anyone to make a copy for the purpose of reading it. The PDF rendition contains fonts which are Copyright American Mathematical Society and licensed under the open font license.

The source `.tar.gz`

includes various generator and development
programs which are all
GPLv3 up. They're
mostly Perl and a bit rough. Some C code makes graphs for
Nauty. The document has
self-tests in Pari/GP and the
functions there are extracted to a `devel/c-curve-defines.gp`

which
is highly specific to the document but might be of interest for experimenting.
(Requires GP 2.9 up for some things.) A big Pari/GP file has generating
functions for the various configuration counts.

See Math::PlanePath::CCurve for
Perl code implementing curve coordinate calculations. The corresponding
CCurve section of the
PlanePath image gallery has some pictures. The PlanePath sources include an
`examples/c-curve-wx.pl`

program for interactive viewing (with
wxPerl).

This page Copyright 2015, 2016, 2017, 2018, 2019 Kevin Ryde.