What are unipotent flows?

Some articles on unipotent flows, flows:

Ratner's Theorems
... a group of major theorems in ergodic theory concerning unipotent flows on homogeneous spaces proved by Marina Ratner around 1990 ... out of Ratner's earlier work on horocycle flows ... The study of the dynamics of unipotent flows played a decisive role in the proof of the Oppenheim conjecture by Grigory Margulis ...

Famous quotes containing the word flows:

    A saint is good who wanders constantly.
    Water is good which flows continuously.
    Punjabi proverb, trans. by Gurinder Singh Mann.