iv
Typos. The fourth edition contains a list of the people who made cor-
rections to the first three editions. With apologies to those whose contri-
butions I lost track of, this time I need to thank: Richard Arratia, Benson
Au, Swee Hong Chan, Conrado Costa, Nate Eldredge, Steve Evans, Ja-
son Farnon, Christina Goldschmidt, Eduardo Hota, Martin Hildebrand,
Shlomo Leventhal, Jan Lieke, Kyle MacDonald, Ron Peled, Jonathan
Peterson, Erfan Salavati, Byron Schmuland, Timo Seppalainen, Antonio
Carlos de Azevedo Sodre, Shouda Wang, and Ruth Williams. I must con-
fess that Christophe Leuridan pointed one out that I have not corrected.
Lemma 3.4.19 incorrectly asserts that the distributions in its statement
have mean 0, but their means do not exist. The conclusion remains valid
since they are differentiable at 0. A sixth edition is extremely unlikely,
but you can email me about typos and I will post them on my web side.
Family update. As the fourth edition was being completed, David
had recently graduated from Ithaca College and Greg was in his last
semester at MIT applying to graduate school in computer science. Now,
eight years later, Greg has graduated from Berkeley, and is an Assistant
Professor in the Computer Science department at U of Texas in Austin.
Greg works in the field of machine learning, specifically natural language
processing. No, I don’t know what that means but it seems to pay well.
David got his degree in journalism. After an extensive job search process
and some free lance work, David has settled into a steady job working for
a company that produces newsletters for athletic directors and trainers.
In the summer of 2010, Susan and I moved to Durham. Since many
people think that the move was about the weather, I will mention that
during our first summer it was 104 degrees (and humid!) three days in a
row. Yes, it almost never snows here, but when it does, three inches of
snow (typically mixed with ice) will shut down the whole town for four
days. It to ok some time for us to adjust to the Durham/Chapel area,
which has about 10 times as many people as Ithaca and is criss-crossed
by freeways, but we live in a nice quiet neighborhood near the campus.
Susan enjoys volunteering at the Sarah P. Duke gardens and listening to
their talks about the plants of North Carolina and future plans for the
gardens.
As I write this it is the last week before school starts.
Rick Durrett, summer 2018
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