The Mathematics
Magazine journal presents articles and notes on undergraduate
mathematical topics in a lively expository style that appeals
to students and faculty throughout the undergraduate years. Mathematics
Magazine is published five times per year. It
also publishes a prestigious and interesting section of proposed problems,
currently 4 each issue. Below there is a selection of such proposed problems
which I published in the journal.
List
of the published Mathematics Magazine proposals
1. Problem 1666, Mathematics Magazine (October 2003)
An extension of the
3-variable Schur inequality
Let
with f
increasing and g analytic. Suppose that
for all
, n integer. Show that
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for all
such that
(or a circular
permutation arrangement) and where the
above summation is considered in a cyclic way.
2. Problem
1652, Mathematics Magazine (June 2002)
Let R and r be the circumradius and inradius respectively of triangle ABC and let p denote its semiperimeter. Prove the following inequalities, and show that in each casethe constant on the right hand side is the best possible:
a)
. b)
. c)
.