Orbifold Notation - Equal Groups

Equal Groups

The following groups are isomorphic:

  • 1* and *11
  • 22 and 221
  • *22 and *221
  • 2* and 2*1.

This is because 1-fold rotation is the "empty" rotation.

Read more about this topic:  Orbifold Notation

Famous quotes containing the words equal and/or groups:

    “The embattled gates to equal rights indeed opened up for modern women, but I sometimes think to myself: “That is not what I meant by freedom—it is only ‘social progress.’””
    —Helene Deutsch (1884–1982)

    “The awareness of the all-surpassing importance of social groups is now general property in America.”
    —Johan Huizinga (1872–1945)