[martin_balsam]

I studied with Günter Ziegler at FU Berlin and he’s been by far the best lecturer I’ve ever had. Had a great taste in clarity and beauty in presenting rigorous proofs.

Just looking at his handwriting in the photos brings back good memories.

[codethief]

I went to a talk of him once (I think at Heidelberg University) and can confirm: He is an outstandingly good speaker.