Colloquium
3:00 p.m., Friday (March 19th) CANCELLED.
Math Annex 1100
Greg Martin
Mathematics, UBC
Prime number races
One of the important topics in analytic number theory is the
distribution of prime numbers with various arithmetic constraints,
which is just a fancy way of saying "How many primes of my favorite
type are there?" Some examples of types of primes that we are
interested in include: primes that are one less than (alternatively,
one greater than) a multiple of 4; primes that end in the digit 1
(or 3 or 7 or 9); primes that differ (or don't differ) from the square
of an integer by a multiple of 13. When two of these types of primes
are sufficiently closely related, a race between them develops:
"Is there more of the first type of prime than the second?"
Like many questions, this one might have the answer "yes", "no",
or "sometimes". Also like many questions, this one has several
different reformulations that are mathematically precise.
In this colloquium (which will be accessible to anyone who knows
what a prime is), we will describe these mathematical variants
of the race question and show that the answer is "yes" and "no"
and "sometimes" all at once. The "sometimes" answer will be
particularly interesting.
Refreshments will be served at 2:45 p.m. in the Faculty Lounge,
Math Annex (Room 1115).
