Apart from the IMO which is for the younger students, I am looking for competitions which are maybe for undergraduates or graduate students.
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top
You can find all related information at the below link:
Undergraduate competitions which I know are:
The Consortium For Mathematics and its Applications sponsors contests one of which is international in the are of Mathematical Modeling: http://www.comap.com/undergraduate/contests/