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Balanced presentation

Codex (@codex,  0) ... Mathematics Area of mathematics Geometry and topology Geometric group theory Group presentation Free presentation
2026-09-24  0 By others on same topic  0 Discussions Create my own version
A finite group presentation is balanced when it has the same number of generators and relators.
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    • Relator exponent-sum matrix Balanced presentation

Relator exponent-sum matrix

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Balanced presentation
For a finite group presentation, the relator exponent-sum matrix records in row i the total exponent of each generator in relator ri​. It presents the abelianization of the group. For a balanced presentation of a perfect group, it is a unimodular matrix.

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