Witt Group/witt-grothendieck Ring

Famous quotes containing the words group and/or ring:

    We often overestimate the influence of a peer group on our teenager. While the peer group is most influential in matters of taste and preference, we parents are most influential in more abiding matters of standards, beliefs, and values.
    David Elkind (20th century)

    I saw Eternity the other night,
    Like a great ring of pure and endless light,
    Henry Vaughan (1622–1695)