A subgroup of a group can also be defined as another abstract group along with an injective homomorphism (or embedding) from that abstract group to the given group. Here, the other abstract group can be naturally identified via its image under the homomorphism, which is the subgroup in a more literal sense.
For the skate brand of the same name, see Roller Derby (brand). Roller derby is a contact sport played by two teams of five members roller skating in the same direction around a track. Game play consists of a series of short match ups (jams) in which both teams designate a jammer who scores points by lapping members of the opposing team.
You donât need to spend a fortune on gear. You can always borrow gear if you plan ahead by emailing join@charlotterollergirls and letting us know you need to borrow certain items or everything. Roller derby is a high impact, full contact sport and we want to make sure you are protected from falls and hits.