I am a CS graduate student in Germany. One course I took required students to submit a program that solves a certain problem to pass. This problem requires a clever approach to solve efficiently, and a certain threshold of performance needed to be met.
The teacher is enthusiastic about his area of research and beyond this, strongly encouraged us to seek even better solutions. These were to then participate in a little championship, with fame (not grade bonuses) for the first places.
I ended up putting a lot of time and effort into the assignment and found a few ideas that allowed me to solve the problem several orders of magnitude faster than usual solutions.
However, after the mandatory part of the class finished, there was no further communication from the teacher at all. He did not respond to the two or three (friendly) emails I sent in the year since. He is still teaching the same course with similar conditions on a championship.
I am confused why he never responded. I believe I was always polite and not pushy, as I understand he is working a lot and lacks time. Still, I find the current state of affairs disappointing. I was hoping for something like a short letter declaring successful participation in (whatever kind of) championship. (Since this is in Germany, we always use written testimonials instead of personal references.)
Is this too much to ask for? Or should I try and get an appointment with him to briefly talk about my concerns?