As you see, the current version of PEN extended does not contain the problems in year 2008.
Please, send us number theory problems in national math olympiads ( taken in between September ‘07 and June ‘08 ) and selection test for IMO 2008 from your country. The problems we receive will be included in the [...]
Archive for June, 2008
One more letter
Posted in Notice on June 27, 2008 | 3 Comments »
Big Picture
Posted in Notice on June 27, 2008 | 1 Comment »
To PEN friends.
After about two months, we will weblish the first official edition of PEN extended with more problems. This means that PEN Problems Book has at least 1000 challenging Problems in Elementary Number theory.
THE NEXT STEP IS OBVIOUS: THE EFFICIENT USE OF DATABASE. It entirely depends on you, PEN friends! To complete PEN Solutions [...]
PEN extended!
Posted in Notice on June 25, 2008 | Leave a Comment »
Hi, PEN FRIENDS!
Here is the pdf file of PEN extended (version 0.9)! Lots of interesting problems from recent mathematics olympiads are available, YAY! Good problems from this book will be taken, and included to the original PEN Problems Book. If you find any typos or errors, then please email us at pen@problem-solving.be
PEN Problems Book has [...]
