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.
Looming over Six Flags Great Adventure in Jackson, New Jersey, the Kingda Ka is the worldâs tallest roller-coaster at 456 feet (139 metres) with a petrifying 418-foot drop (127 metres). It is also the second fastest coaster in the world with top speeds reaching 206 km/h (128 mph) in just 3.5 seconds.