Combinatorics Through Guided Discovery, 2004a
Combinatorics Through Guided Discovery, 2004a
Combinatorics Through Guided Discovery, 2004a
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
xii<br />
<strong>Discovery</strong> had been placed on the aim list of approved open source textbooks, but<br />
there had been no success in finding someone to take on the task of updating the<br />
source to match the pdf. The three of us came together again in May 2017 at the<br />
University of Puget Sound for another workshop on open educational resources<br />
and agreed to cooperate to complete the conversion of this book to PreTeXt. The<br />
fact that ol wanted to use parts of the book for his Fall 2017 class gave us the<br />
motivation required to complete the project over the summer.<br />
For this edition, our goal has been to reproduce the text of Bogart’s final pdf<br />
as faithfullly as possible. Based on our own classroom uses, we have notes about<br />
problems that could use revising, but we agreed the right first step would be to<br />
have source files that matched what Bogart left. We have, however, corrected<br />
obvious errors along the way, which included moving the Supplementary Chapter<br />
Problems in Chapter 3 from the level of a subsection to the level of a section for<br />
consistency with the other chapters. Footnotes may be numbered differently, as in<br />
this edition, a footnote in the body of a problem is rendered with the problem and<br />
numbered in a different sequence. The hints that previously were accessed by links<br />
from the pdf to a Dartmouth webpage have also been included in the backmatter<br />
of the print edition as Appendix D. Links to open hints in place are available in<br />
the HTML version, while in the print and PDF edition, the existence of a hint is<br />
indicated by “(h)” at the end of the problem (or part of a problem). David Farmer<br />
provided invaluable assistance by automating the initial conversion of L A TEX files<br />
to PreTeXt and extracting the text of the hints from the pdf files. We then worked<br />
in parallel to compare the official pdf to what we were able to produce from the<br />
source until they matched. Since this process could not be truly automated, we<br />
suspect there will be some places where Bogart’s pdf and this edition do not match.<br />
We welcome reports of these through issues and pull requests on the Github<br />
site for the book https://github.com/OpenDiscreteMath/ibl-combinatorics/. Going<br />
forward, we would like to see community-driven updates to further develop the<br />
text, either by improving existing problems, adding new problems on existing<br />
topics, or adding new topics suitable for a course based on this text. One area of<br />
development may be to include SageMath to the text, since PreTeXt includles a<br />
number of nice features for doing this and some of the material may benefit from<br />
the addition of a computer algebra system to allow more interesting calculations<br />
than would be feasible by hand.<br />
An html version of this text is available at http://bogart.openmathbooks.org/. A<br />
low-cost print edition is available for purchase online. The cost of the print edition<br />
is kept as low as possible, and any royalties received support costs associated with<br />
hosting and distributing the text. A pdf copy of print edition is also posted on the<br />
book’s site. The pdf may provide a better experience for searching than the HTML<br />
version.<br />
Mitchel T. Keller, Oscar Levin, and Kent E. Morrison<br />
Lexington, Virginia; Greeley, Colorado; and San Jose, California<br />
December 2017