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  Selected Sites   (see also All Sites in this category)

  1. Curve Family Index (Visual Dictionary of Special Plane Curves) - Xah Lee
    A discussion of the many ways to classify curves, how they are named, a curve family tree, and interconnection between curves, with related Web sites about fractals and curves. Hosted by the Math Forum. more>>

  2. DG Differential Geometry (Front for the Mathematics ArXiv) - Univ. of California, Davis
    Differential Geometry preprints, from the U.C. Davis front end for the xxx.lanl.gov e-Print archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic. more>>

  3. Differential Geometry - Dave Rusin; The Mathematical Atlas
    A short article designed to provide an introduction to differential geometry, the language of modern physics and an area of mathematical delight. Typically, one considers sets which are manifolds (that is, locally resemble Euclidean space) and which come equipped with a measure of distances. In particular, this includes classical studies of the curvature of curves and surfaces. Local questions both apply and help study differential equations; global questions often invoke algebraic topology. History, applications and related fields and subfields; textbooks, reference works, and tutorials; software and tables; other web sites with this focus. more>>

  4. A Visual Dictionary of Special Plane Curves - Xah Lee
    Materials that demonstrate interesting properties of plane curves visually. Many concepts or properties of plane curves, such as cusp, tangent, evolute, involute, or envelope, are more readily explained by an illustration or animation. The mathematics in these pages are beginning college level; overall, the project is designed to educate and entertain. Mathematica, QuickTime, Sketchpad, and Cabri files are included, with methods of generating new curves and individual Special Plane Curves, from the Archimedian Spiral to the Witch of Agnesi. Also a Curve Family Index. Hosted by the Math Forum. more>>


 

Mason error

error in file:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm
 
line 79:  Bizarre copy of ARRAY in aassign
context:  
... 
75:  # them according to the format variables defined earlier in
76:  # this file and join them onto the $sub sub-routine string
77:  if ($hargs) {
78:  # we may trash some of the args so we take a copy
79:  @a = @DB::args; # must get local copy of args
80:  # don't print any more than $MaxArgNums
81:  if ($MaxArgNums and @a > $MaxArgNums) {
82:  # cap the length of $#a and set the last element to '...'
83:  $#a = $MaxArgNums;
... 
component stack:   /library/branch.html
/library/dhandler
code stack:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm:79

debug info:   Debug file is '/var/lib/mason/debug/anon/6'.

raw_error





























raw error:
 






























error while executing /library/branch.html:
Bizarre copy of ARRAY in aassign at /usr/lib/perl5/5.6.0/Carp/Heavy.pm line 79.