Gleanings from combinatorics
Two problems in combinatorial geometry
Sheep fleecing with Walter Funkenbusch
Two problems with graph theory
Two applications of generating functions
Some problems from the Olympiads
A second look at the Fibonacci and Lucas numbers
Some problems in combinatorics
Four clever schemes in cryptography
Gleanings from number theory
Schur's theorem: an application of Ramsey's theorem.
Two applications of Helly's theorem
An introduction to Ramanujan's highly composite numbers
On sets of points in the plane
Two surprise from algebra
Cai Mao-Cheng's solution to Katona's problem on families of separating subsets.
