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<H2><I>Online Mathematics Textbooks</I></H2>
<P></CENTER>
<HR>
The writing of textbooks and making them freely available on the web is =
an idea=20
whose time has arrived. Most college mathematics textbooks attempt to be =
all=20
things to all people and, as a result, are much too big and expensive. =
This=20
perhaps made some sense when these books were rather expensive to =
produce and=20
distribute--but this time has passed.=20
<P>A few years ago when I first posted a list of mathematics textbooks =
freely=20
available on line, there existed only a handful of such books. Now there =
are=20
many. The list here has grown and grown and is perhaps in serious need =
of some=20
kind of organization into topics. There are also now many other sites at =
which=20
there are links to on-line mathematics books and lecture notes. This =
site is far=20
from comprehensive and I have considered abandoning it. Many people, =
however,=20
still seem to find it useful, and so I shall continue to maintain it in =
its=20
present unorganized form.=20
<P>
<HR>

<OL>
  <LI>Professor <A href=3D"http://www.math.gatech.edu/~herod">Jim =
Herod</A> and I=20
  have written <A=20
  =
href=3D"http://www.math.gatech.edu/~cain/notes/calculus.html"><I>Multivar=
iable=20
  Calculus</I></A> ,a book which we and a few others have used here at =
Georgia=20
  Tech for two years. We have also proposed that this be the first =
calculus=20
  course in the curriculum here, but that is another story....
  <P></P>
  <LI>Although it is still in print, <A=20
  =
href=3D"http://ocw.mit.edu/ans7870/textbooks/Strang/strangtext.htm"><I>Ca=
lculus</I></A>,by=20
  <A href=3D"http://www-math.mit.edu/~gs/">Gilbert Strang</A> is made =
available=20
  through <A href=3D"http://ocw.mit.edu/index.html">MIT's =
OpenCourseWare</A>=20
  electronic publishing initiative.
  <P></P>
  <LI>Here is one that has also been used here at Georgia Tech. <A=20
  href=3D"http://www.mathphysics.com/pde/"><I>Linear Methods of Applied=20
  Mathematics</I></A>, by <A =
href=3D"http://www.math.gatech.edu/~harrell">Evans=20
  Harrell</A> and <A href=3D"http://www.math.gatech.edu/~herod">James =
Herod</A>.
  <P></P>
  <LI>Yet another one produced at Georgia Tech is <A=20
  =
href=3D"http://www.math.gatech.edu/~herod/Hspace/Hspace.html"><I>Linear =
Algebra,=20
  Infinite Dimensions, and Maple</I></A>, by <A=20
  href=3D"http://www.math.gatech.edu/~herod">James Herod</A>.
  <P></P>
  <LI>I have also written a modest book, <A=20
  =
href=3D"http://www.math.gatech.edu/~cain/winter99/complex.html"><I>Comple=
x=20
  Analysis</I></A>, which I have used in our introductory undergraduate =
complex=20
  analysis course here.
  <P></P>
  <LI><A href=3D"http://www.math.uiuc.edu/~r-ash"><I>Complex =
Variables</I> </A>,=20
  by <A href=3D"http://www.math.uiuc.edu/~r-ash">Robert Ash</A> and <A=20
  href=3D"http://www.math.fsu.edu/People/faculty.php?id=3D448">W. P. =
Novinger</A>.=20
  This is a substantial revision of the first edition of Professor Ash's =
complex=20
  variables text originally published in 1971.
  <P></P>
  <LI>Professor <A href=3D"http://www.math.miami.edu/~ec">E.H. =
Connell</A> of the=20
  University of Miami has made available on the web his book <A=20
  href=3D"http://www.math.miami.edu/~ec/book"><I>Elements of Abstract =
and Linear=20
  Algebra</I></A>. You should read his insightful comments about =
textbooks.=20
  <P></P>
  <LI>An introductory algebraic topology book, <A=20
  href=3D"http://www.math.cornell.edu/~hatcher/"><I>Algebraic Topology =
I</I></A>,=20
  by <A href=3D"http://www.math.cornell.edu/~hatcher/">Professor Allen=20
  Hatcher</A>, of Cornell University, is available, and Professor =
Hatcher=20
  promises the second volume, Algebraic Topology II, will be ready soon. =

  <P></P>
  <LI><A href=3D"http://msri.org/publications/books/gt3m/"><I>The =
Geometry and=20
  Topology of Three-Manifolds</I></A>, by William Thurston. This is an=20
  electronic edition of the 1980 lecture notes distributed by Princeton=20
  University.
  <P></P>
  <LI><A href=3D"http://joshua.smcvt.edu/math/hefferon.html">Professor =
Jim=20
  Hefferon</A> of Saint Michaels's College has made available his =
undergraduate=20
  textbook <A href=3D"http://joshua.smcvt.edu/linalg.html"><I>Linear=20
  Algebra</I></A>.
  <P></P>
  <LI>Another elementary linear algebra textbook is <A=20
  href=3D"http://www.numbertheory.org/book/"><I>Elementary Linear =
Algebra</I></A>,=20
  by <A href=3D"http://www.maths.uq.edu.au/~krm">Keith Matthews</A>.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.dartmouth.edu/~chance/teaching_aids/books_atricles/pro=
bability_book/book.html"><I>Introduction=20
  to Probability</I></A>, by Charles Grinstead &amp; J. Laurie Snell.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.ellerman.org/Davids-Stuff/Maths/Rota-Baclawski-Prob-Th=
eory-79.pdf"><I>An=20
  Introduction to Probability and Random Processes</I></A>, by =
Gian-Carlo Rota=20
  and <A href=3D"http://www.ccs.neu.edu/home/kenb/">Kenneth =
Baclawski</A>. This is=20
  the 1979 manuscript of the work Professor Rota had been working on for =
some=20
  time. It is made available through the efforts of <A=20
  =
href=3D"http://www.ellerman.org/Davids-Stuff/AboutDavidEllerman.htm">Davi=
d=20
  Ellerman.</A>=20
  <P></P>
  <LI><A href=3D"http://www.cis.upenn.edu/~wilf">Professor Herbert =
Wilf</A> (and=20
  the publisher, <A href=3D"http://www.akpeters.com/">A. K. Peters</A>) =
has made=20
  available his book <A=20
  =
href=3D"http://www.math.upenn.edu/~wilf/DownldGF.html"><I>generatingfunct=
ionology</I></A>.
  <P></P>
  <LI>Another one by <A =
href=3D"http://www.cis.upenn.edu/~wilf">Professor Wilf</A>=20
  is <A =
href=3D"http://www.cis.upenn.edu/~wilf/AlgComp3.html"><I>Algorithms and=20
  Complexity</I></A>.
  <P></P>
  <LI><A href=3D"http://www.cis.upenn.edu/~wilf/AeqB.html"><I>A =3D =
B</I></A>, by=20
  Marko Petkovsek, <A href=3D"http://www.cis.upenn.edu/~wilf">Herbert =
Wilf</A>,=20
  and <A href=3D"http://www.math.temple.edu/~zeilberg/">Doron =
Zeilberger</A>. This=20
  one is also available in print and is available online with the =
blessing of=20
  the publisher, <A href=3D"http://www.akpeters.com/">A. K. Peters, =
Ltd.</A>.
  <P></P>
  <LI>Perhaps the greatest textbook of them all is <A=20
  =
href=3D"http://aleph0.clarku.edu/~djoyce/java/elements/toc.html"><I>Eucli=
d's=20
  Elements</I></A>.
  <P></P>
  <LI>Originally published by <A=20
  href=3D"http://www.springer.de/">Springer-Verlag</A>, the book <A=20
  href=3D"http://www.math.uwaterloo.ca/~snburris/htdocs/ualg.html"><I>A =
Course in=20
  Universal Algebra</I></A>, by <A=20
  href=3D"http://www.math.uwaterloo.ca/~snburris/">Stanley Burris</A>, =
and H. P.=20
  Sankappanavar, is available online.
  <P></P>
  <LI><A href=3D"http://www.math.uiuc.edu/~r-ash/">Professor Robert =
Ash</A> has=20
  written and made available <A=20
  href=3D"http://www.math.uiuc.edu/~r-ash/"><I>Abstract Algebra:The =
Basic Graduate=20
  Year</I></A>.
  <P></P>
  <LI>Another one by <A =
href=3D"http://www.math.uiuc.edu/~r-ash/">Professor=20
  Ash</A> is <A href=3D"http://www.math.uiuc.edu/~r-ash/"><I>A Course In =
Algebraic=20
  Number Theory</I></A>.
  <P></P>
  <LI><A href=3D"http://www.math.uiuc.edu/~r-ash/">Professor Ash</A> has =
also=20
  completed and made available <A =
href=3D"http://www.math.uiuc.edu/~r-ash/"><I>A=20
  Course in Commutative Algebra</I></A>.=20
  <P></P>
  <LI><A href=3D"http://www.math.byu.edu/Math/CalculusBible/"><I>The =
Calculus=20
  Bible</I></A> is an elementary calculus textbook from Professor G. S. =
Gill of=20
  the <A href=3D"http://www.math.byu.edu/">Brigham Young University =
Mathematics=20
  Department</A>.
  <P></P>
  <LI><A =
href=3D"http://www.understandingcalculus.com/index.php"><I>Understanding =

  Calculus</I></A>, by Faraz Hussain.=20
  <P></P>
  <LI><A=20
  =
href=3D"http://edoutreach.wpafb.af.mil/Educator%20Resources/Math%20Resour=
ces/CalculuswoLimits.pdf"><I>Calculus=20
  Without Limits</I></A>, by John C. Sparks.
  <P></P>
  <LI>Originally published by Prindle, Weber &amp; Schmidt but currently =
out of=20
  print, <A =
href=3D"http://www.math.wisc.edu/~keisler/calc.html"><I>Elementary=20
  Calculus: An Approach Using Infinitesimals</I></A>, by <A=20
  href=3D"http://www.math.wisc.edu/~keisler">Professor H. Jerome =
Keisler</A>, is=20
  now freely available online.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.math.uni-hamburg.de/home/diestel/books/graph.theory/in=
dex.html"><I>Graph=20
  Theory</I></A>, by <A=20
  href=3D"http://www.math.uni-hamburg.de/home/diestel/">Reinhard =
Diestel</A>.
  <P></P>
  <LI>Available for self-study from <A =
href=3D"http://www.trillia.com/">The=20
  Trillia Group</A> is <A =
href=3D"http://www.trillia.com/zakon1.html"><I>Basic=20
  Concepts of Mathematics</I></A>, by Elias Zakon.
  <P></P>
  <LI>Another one from <A href=3D"http://www.trillia.com/">The Trillia =
Group</A>=20
  is <A href=3D"http://www.trillia.com/moser-number.html"><I>An =
Introduction to=20
  the Theory of Numbers</I></A> by Leo Moser.=20
  <P></P>
  <LI>Yet another from <A href=3D"http://www.trillia.com/">The Trillia =
Group</A>=20
  is <A =
href=3D"http://www.trillia.com/zakon-analysisI.html"><I>Mathematical=20
  Analysis I</I></A>, by Elias Zakon.=20
  <P></P>
  <LI>Thanks to Malaspina Great Books, <A=20
  href=3D"http://www.malaspina.com/etext/heavens.htm"><I>Mechanism of =
the=20
  Heavens</I> (1831)</A>, by Mary Somerville, is available online. This =
second=20
  edition was prepared by Russell McNeil.
  <P></P>
  <LI><A=20
  =
href=3D"http://robotics.eecs.berkeley.edu/~varaiya/papers_ps.dir/NOO.pdf"=
><I>Lecture=20
  Notes on Optimization</I></A>, by <A=20
  href=3D"http://robotics.eecs.berkeley.edu/~varaiya/">Pravin =
Varaiya</A>. This is=20
  a re-issue of a book out of print since 1975. It is an introduction to =

  mathematical programming, optimal control, and dynamic programming.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.math.ubc.ca/people/faculty/cass/graphics/text/www/inde=
x.html"><I>A=20
  Manual of Mathematical Ilustration</I></A>, by <A=20
  href=3D"http://www.math.ubc.ca/people/faculty/cass/">Bill =
Casselman</A>, shows,=20
  at several levels of sophistication, how to use PostScript for =
producing=20
  mathematical graphics.
  <P></P>
  <LI><A href=3D"http://euclid.trentu.ca/math/sb/pcml/pcml.html"><I>A =
Problem=20
  Course in Mathematical Logic</I></A>, by <A=20
  href=3D"http://euclid.trentu.ca/math/sb/stefan.html">Stefan =
Bilaniuk</A> .
  <P></P>
  <LI><A =
href=3D"http://faculty.vassar.edu/lowry/webtext.html"><I>Concepts and=20
  Applications of Inferential Statistics</I></A>, by <A=20
  href=3D"http://psychology.vassar.edu/lowry.html">Richard Lowry</A>.=20
  <P></P>
  <LI>To be published soon by Cambridge University Press, <A=20
  href=3D"http://shoup.net/ntb/"><I>A Computational Introduction to =
Number Theory=20
  and Algebra</I></A>, by <A href=3D"http://shoup.net/">Victor Shoup</A> =
will=20
  nevertheless remain freely available on-line.
  <P></P>
  <LI>Out of print for sometime, but freely available is <A=20
  =
href=3D"http://www.ecp6.jussieu.fr/pageperso/bondy/books/gtwa/gtwa.html">=
<I>Graph=20
  Theory with Applications</I></A>, by <A=20
  href=3D"http://www.ecp6.jussieu.fr/pageperso/bondy/main.html">J. A. =
Bondy</A>=20
  and U. S. R. Murty.
  <P></P>
  <LI>Yet another one out of print, but now freely available is <A=20
  href=3D"http://www.stat.yale.edu/~pollard/1984book/"><I>Convergence of =

  Stochastic Processes</I></A>, by <A=20
  href=3D"http://www.stat.yale.edu/~pollard/">David Pollard</A>.=20
  <P></P>
  <LI>Designed for undergraduate physics students is <A=20
  =
href=3D"http://www.physics.miami.edu/nearing/mathmethods/"><I>Mathematica=
l Tools=20
  for Physics</I></A>, by James Nearing.
  <P></P>
  <LI><A href=3D"http://modular.ucsd.edu/ent/"><I>Elementary Number=20
  Theory</I></A>, by <A href=3D"http://modular.ucsd.edu/">William =
Stein.</A>
  <P></P>
  <LI><A=20
  =
href=3D"http://vmm.math.uci.edu/3D-XplorMath/Surface/a/bk/curves_surfaces=
_palais.pdf"><I>A=20
  Modern Course on Curves and Surfaces</I></A>, by <A=20
  href=3D"http://math.uci.edu/~palais/">Richard Palais</A>.
  <P></P>
  <LI><A href=3D"http://linear.ups.edu/"><I>A First Course in Linear=20
  Algebra</I></A>, by <A href=3D"http://buzzard.ups.edu/">Rob =
Beezer</A>.
  <P></P>
  <LI><A =
href=3D"http://www.cns.gatech.edu/GroupTheory/index.html"><I>Group=20
  Theory</I></A>, by <A =
href=3D"http://www.cns.gatech.edu/~predrag/">Pedrag=20
  Civitanovic</A>.
  <P></P>
  <LI><A =
href=3D"http://www.math.harvard.edu/people/SternbergShlomo.html">Shlomo=20
  Sternberg</A> has written <A=20
  =
href=3D"http://www.math.harvard.edu/~shlomo/docs/Real_Variables.pdf"><I>T=
heory=20
  of Functions of a Real Variable</I></A>.
  <P></P>
  <LI><A =
href=3D"http://www.math.harvard.edu/~shlomo/docs/lie_algebras.pdf"><I>Lie=
=20
  Algebras</I></A> is another one by <A=20
  =
href=3D"http://www.math.harvard.edu/people/SternbergShlomo.html">Professo=
r=20
  Sternberg<A>
  <P></P>
  <LI>Yet another one by <A=20
  =
href=3D"http://www.math.harvard.edu/people/SternbergShlomo.html">Professo=
r=20
  Sternberg</A> is <A=20
  =
href=3D"http://www.math.harvard.edu/~shlomo/docs/semi_riemannian_geometry=
.pdf"><I>Semi-Riemann=20
  Geometry and General Relativity</I></A>
  <P></P>
  <LI><A=20
  =
href=3D"http://www.math.harvard.edu/~shlomo/docs/Advanced_Calculus.pdf"><=
I>Advanced=20
  Calculus</I></A>, by Lynn Loomis and Schlomo Sternberg
  <P></P>
  <LI><A href=3D"http://math.furman.edu/~dcs/book/"><I>Difference =
Equations to=20
  Differential Equations</I></A>, by <A =
href=3D"http://math.furman.edu/~dcs/">Dan=20
  Sloughter</A>.
  <P></P>
  <LI><A href=3D"http://math.furman.edu/~dcs/mvbook/"><I>The Calculus of =
Functions=20
  of Several Variables</I></A> is another one by <A=20
  href=3D"http://math.furman.edu/~dcs/">Professor Sloughter</A>.
  <P></P>
  <LI><A href=3D"http://www.math.cornell.edu/~bterrell/dn.pdf"><I>Notes =
on=20
  Differential Equation</I></A>, by <A=20
  href=3D"http://www.math.cornell.edu/~bterrell/">Bob Terrell</A>.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.cosc.brocku.ca/~duentsch/papers/methprimer1.html"><I>S=
ets,=20
  Relations, Functions</I></A>, by <A=20
  href=3D"http://www.cosc.brocku.ca/~duentsch/">Ivo D=C3=BCntsch</A> and =
G=C3=BCnther=20
  Gediga.=20
  <P></P>
  <LI>Another one by <A =
href=3D"http://www.cosc.brocku.ca/~duentsch/">D=C3=BCntsch</A>=20
  and Gediga is <A=20
  =
href=3D"http://www.cosc.brocku.ca/~duentsch/papers/methprimer2.html"><I>R=
ough=20
  Set Data Analysis</I></A>.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.math.princeton.edu/~nelson/books/pa.pdf"><I>Predicativ=
e=20
  Arithmetic</I></A>, by <A=20
  href=3D"http://www.math.princeton.edu/~nelson/index.html">Edward =
Nelson</A>.
  <P></P>
  <LI><A =
href=3D"http://www.cwru.edu/artsci/math/wells/pub/ttt.html"><I>Toposes,=20
  Triples and Theories</I></A>, by <A=20
  href=3D"http://www.math.mcgill.ca/barr/">Michael Barr</A> and <A=20
  href=3D"http://www.cwru.edu/artsci/math/wells/home.html">Charles =
Wells</A>. This=20
  was orinally published by Springer-Verlag, 1985
  <P></P>
  <LI><A=20
  =
href=3D"http://www.inference.phy.cam.ac.uk/mackay/itila/book.html"><I>Inf=
ormation=20
  Theory, Inference, and Learning Algorithms</I></A>, by <A=20
  href=3D"http://www.inference.phy.cam.ac.uk/mackay/">David J. C. =
MacKay</A> is=20
  published by Cambridge University Press, but is, nevertheless, freely=20
  available online.
  <P></P>
  <LI><A href=3D"http://xaravve.trentu.ca/305/305.pdf"><I>Linear Partial =

  Differential Equations and Fourier Theory</I> </A>, by <A=20
  href=3D"http://xaravve.trentu.ca/pivato/index.html">Marcus Pivato</A>.
  <P></P>
  <LI>Another one by <A=20
  href=3D"http://xaravve.trentu.ca/pivato/index.html">Professor =
Pivato</A> is <A=20
  =
href=3D"http://xaravve.trentu.ca/pivato/Teaching/voting.pdf"><I>Voting,=20
  Arbitration, and Fair Division: The Mathematics of Social =
Choice</I></A>.
  <P></P>
  <LI><A =
href=3D"http://repositories.tamu.edu/handle/1969.1/2502"><I>Introduction =

  to Vectors and Tensors, Volume 1, Linear and Multilinear =
Algebra</I></A>, and=20
  <A =
href=3D"http://repositories.tamu.edu/handle/1969.1/3609"><I>Introduction =
to=20
  Vectors and Tensors, Volume 2, Vector and Tensor Analysis</I></A> by =
<A=20
  href=3D"http://repositories.tamu.edu/handle/1969.1/2500">Ray M. =
Bowen</A> and=20
  C.-C.Wang, are revised versions of books originally published by =
Plenum Press=20
  in 1976.=20
  <P></P>
  <LI>Another one by <A=20
  href=3D"http://repositories.tamu.edu/handle/1969.1/2500">Professor =
Bowen</A> and=20
  originally published by Plenum Press is <A=20
  =
href=3D"http://repositories.tamu.edu/handle/1969.1/2501"><I>Introduction =
to=20
  Continuum Mechanics for Engineers</I></A>.=20
  <P></P>
  <LI><A =
href=3D"http://www.ece.uwaterloo.ca/~ece204/TheBook/"><I>Numerical=20
  Methods and Analysis for Engineers</I></A>, by <A=20
  href=3D"http://cheetah.vlsi.uwaterloo.ca/~dwharder/">Douglas Wilhelm =
Harder</A>.
  <P></P>
  <LI><A=20
  =
href=3D"http://spot.colorado.edu/~baggett/.analysis/analysis.html"><I>Ana=
lysis=20
  of Functions of a Single Variable</I></A>, by <A=20
  href=3D"http://spot.colorado.edu/~baggett/">Lawerence Baggett</A>, was =

  originally written to be used for a one semester senior course, but =
the author=20
  suggests that it is more appropriate for first year graduate students.
  <P></P>
  <LI><A href=3D"http://www.stanford.edu/~boyd/cvxbook/"><I>Convex=20
  Optimization</I></A>, by <A =
href=3D"http://www.stanford.edu/~boyd/">Stephen=20
  Boyd</A>, and <A href=3D"http://www.ee.ucla.edu/~vandenbe/">Lieven=20
  Vandenberghe</A> is freely available thanks to <A=20
  =
href=3D"http://www.cambridge.org/us/catalogue/catalogue.asp?isbn=3D052183=
3787">Cambridge=20
  University Press</A>.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.maths.manchester.ac.uk/~avb/micromathematics/downloads=
"><I>Mathematics=20
  Under the Microscope</I></A>, by <A=20
  href=3D"http://www.maths.manchester.ac.uk/~avb/">Alexandre =
Borovik</A>, is,=20
  according to the author, an attempt "to start a dialogue between=20
  mathematicians and cognitive scientists."=20
  <P></P>
  <LI><A href=3D"http://ee.stanford.edu/~gray/sp.html"><I>Introduction =
to=20
  Statistical Signal Processing</I></A>, by <A=20
  href=3D"http://ee.stanford.edu/~gray/">R. M. Gray</A> and L. D. =
Davisson is,=20
  according to Professor Gray, a "...much revised version of the earlier =
text=20
  <I>Random Processes: An Introduction for Engineers</I>, Prentice-Hall, =
1986,=20
  which is long out of print." The current book is published by <A=20
  =
href=3D"http://www.cambridge.org/aus/catalogue/catalogue.asp?isbn=3D97805=
21838603">Cambridge=20
  University Press</A>.=20
  <P></P>
  <LI>Originally published by Prentice-Hall, and now out of print, <A=20
  href=3D"http://classicalrealanalysis.com/download.aspx"><I>Real=20
  Analysis</I></A>, by Andrew Bruckner, Judith Bruckner, and Brian =
Thomson, is,=20
  thanks to the authors, now freely available online.
  <P></P>
  <LI>Also by Bruckner, Bruckner, and Thomson, and originally published =
by=20
  Prentice-Hall, <A=20
  href=3D"http://classicalrealanalysis.com/download.aspx"><I>Elementary =
Real=20
  Analysis</I></A> is also now available.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.tac.mta.ca/tac/reprints/articles/3/tr3abs.html"><I>Abe=
lian=20
  Categories</I></A>, by Peter Freyd. This was published originally by =
Harper=20
  &amp; Row.=20
  <P></P>
  <LI>Published by Van Nostrand in 1971 and now available is <A=20
  =
href=3D"http://www.tac.mta.ca/tac/reprints/articles/7/tr7abs.html"><I>Cat=
egories=20
  and Groupoids</I></A>, by P. J. Higgins.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.tac.mta.ca/tac/reprints/articles/10/tr10abs.html"><I>B=
asic=20
  Concepts of Enriched Category Theory</I></A>, by G. M. Kelley, was =
published=20
  by Cambridge University Press.
  <P></P>
  <LI><A=20
  =
href=3D"http://www.tac.mta.ca/tac/reprints/articles/17/tr17abs.html"><I>A=
bstract=20
  and Concrete Categories:The Joy of Cats</I></A>, by <A=20
  href=3D"http://www.iti.cs.tu-bs.de/~adamek/adamek.html">Jiri =
Adamek</A>, <A=20
  href=3D"http://www.informatik.uni-bremen.de/~herrlich/">Horst =
Herrlich</A>, and=20
  <A href=3D"http://www.math.ksu.edu/~strecker/">George Strecker</A>.
  <P></P>
  <LI><A =
href=3D"http://www.mth.pdx.edu/~erdman/PTAC/PTAClicensepage.html"><I>A=20
  Problem Text in Advanced Calculus</I></A>, by <A=20
  href=3D"http://www.mth.pdx.edu/~erdman/">John Erdman</A>.
  <P></P>
  <LI><A href=3D"http://abstract.ups.edu/"><I>Abstract Algebra:Theory =
and=20
  Applications</I></A>, by <A =
href=3D"http://faculty.sfasu.edu/judsontw/">Tom=20
  Judson</A>.
  <P></P>
  <LI>Not simply an online textbook, but certainly in the same spirit is =
the <A=20
  href=3D"http://at.yorku.ca/course/index.htm">Topology Webcourse</A> =
project=20
  undertaken by <A href=3D"http://at.yorku.ca/topology/">Topology =
Atlas</A>.
  <P></P>
  <LI>This is, I suppose, not a textbook, but nevertheless an =
interesting=20
  reference: <A href=3D"http://matrixcookbook.com/"><I>The Matrix=20
  Cookbook</I></A>, by <A href=3D"http://2302.dk/uni/">Kaare Brandt =
Petersen</A>,=20
  and Michael Syskind Pedersen.=20
  <P></P></LI></OL>
<HR>
<A href=3D"http://www.math.gatech.edu/~cain/index.html">George =
Cain</A><BR><A=20
href=3D"http://www.math.gatech.edu/">School of Mathematics</A><BR><A=20
href=3D"http://www.gatech.edu/">Georgia Institute of =
Technology</A><BR><A=20
href=3D"mailto:cain@math.gatech.edu">cain@math.gatech.edu</A><BR>
<HR>
<FONT size=3D-1>23 February 2009 </FONT></BODY></HTML>

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