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  1. Dave's short course on Complex Numbers - David Joyce; Clark University
    An introduction to complex numbers, including a little history (quadratic and cubic equations; Fundamental Theorem of Algebra, the number i) and the mathematics (the complex plane, addition, subtraction; absolute value; multiplication; angles and polar coordinates; reciprocals, conjugation, and division; powers and roots), and intended for a general audience having a familiarity with ordinary real numbers (all positive and negative numbers and zero) and algebra. more>>

  2. Imaginary Numbers - Math Forum, Ask Dr. Math FAQ
    What is an imaginary number? What is i? more>>

  3. John and Betty's Journey into Complex Numbers - Matt Bower
    A children's book-on-the-Web from Australia, designed to introduce complex numbers in story form in a way that is intuitive and enjoyable for students. John, Betty, and their dog Trevor solve a series of problems designed to introduce integers, fractions, surds, imaginary numbers, complex numbers, Argand diagram; vectors, multiplication in polar form, relating polar and Cartesian form, De Moivre's theorem; and the Mandelbrot set. more>>


Mason error

error in file:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm
line 79:  Bizarre copy of HASH in aassign
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
code stack:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm:79

debug info:   Debug file is '/var/lib/mason/debug/anon/14'.


raw error:

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