the branch of mathematics that deals with the structure of mathematical groups and mappings between them.
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- group of twenty finance ministers and central bank governors,
- group of twenty-four,
- group practice,
- group representation,
- group speed,
- group therapy,
- group velocity,
- group work,
Origin of group theory
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The branch of mathematics concerned with groups and the description of their properties.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.