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Abstract: Lie group contraction is a process by which Lie groups are
''flattened out''. This thesis finds the algebra of bi-invariant differential operators
(identified with the center of the universal enveloping algebra) for the Galilean group
(which is a contraction of the Poincare group).
Thesis (Ph.D.)--Tufts University, 2015.
Submitted to the Dept. of Mathematics.
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