In-dimensional Euclidean space ( e . g . simply " space " in Galilean relativity ), the isometry group ( the maps preserving the regular Euclidean distance ) is the Euclidean group.
22.
Attention was given to further work on Euclidean geometry and the Euclidean groups by crystallography and the work of H . S . M . Coxeter, and can be seen in theories of Coxeter groups and polytopes.
23.
The set of all ( proper and improper ) rigid transformations is a group called the Euclidean group, denoted E ( " n " ) for " n "-dimensional Euclidean spaces.
24.
The Euclidean group is in fact ( using the previous description of the affine group ) the semi-direct product of the orthogonal ( rotation and reflection ) group with the translations . ( See Klein geometry for more details .)
25.
The contraction limit trivializes the first commutator and thus yields the non-isomorphic algebra of the plane Euclidean group, . ( This is isomorphic to the cylindrical group, describing motions of a point on the surface of a cylinder.
26.
It was again proposed in this context by Gerardus't Hooft . A further development including a quantum differential calculus and an action of a certain ` quantum double'quantum group as deformed Euclidean group of motions was given by Majid and E . Batista
27.
The " unrestricted " version of Hilbert's fifth problem, closer to Hilbert's original formulation, considers both a locally Euclidean group " G " and another manifold " M " on which " G " has a continuous action.
28.
This shows that the group of translations is a normal subgroup of the Euclidean group, that the Euclidean group is a semidirect product of the translation group and, and that the corresponding homomorphism ) } } is given by matrix multiplication : " hn " } }.
29.
This shows that the group of translations is a normal subgroup of the Euclidean group, that the Euclidean group is a semidirect product of the translation group and, and that the corresponding homomorphism ) } } is given by matrix multiplication : " hn " } }.
30.
If the group is compact or semisimple, then the constant of integration can always be chosen to make the moment map coadjoint equivariant; however in general the coadjoint action must be modified to make the map equivariant ( this is the case for example for the Euclidean group ).
