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SymbCompCC

Computing with parametrised presentations for p-groups of fixed coclass

1.4.0

14 August 2026

Dörte Feichtenschlager
Email: d.feichtenschlager@tu-braunschweig.de
Address:
Institut Computational Mathematics
TU Braunschweig
Pockelsstr. 14
D-38106 Braunschweig
Germany

Contents

1 Installing and Loading the SymbCompCC Package

1.1 Installing the SymbCompCC Package

1.2 Loading the SymbCompCC Package

2.2 Background on (polycyclic) parametrised presentations

2.3 Computation of Schur multiplicators

2.4 Computation of low-dimensional cohomology

4 Parametrised Presentations

4.1 Provided pp-presentations

4.1-1 ParPresGlobalVar_2_1
4.1-2 ParPresGlobalVar_p_r_Names

5 Schur extensions for p-power-poly-pcp-groups

5.1 Computing Schur extensions

5.1-1 SchurExtParPres
5.1-2 SchurExtParPres

5.2 Computing other invariants from Schur extensions

  5.2-1 AbelianInvariantsMultiplier
  5.2-2 SchurMultiplicatorPPPPcps
  5.2-3 AbelianInvariants
  5.2-4 ZeroCohomologyPPPPcps
  5.2-5 FirstCohomologyPPPPcps
  5.2-6 SecondCohomologyPPPPcps

5.3 Info classes for the computation of the Schur extension

5.3-1 InfoConsistencyRelPPowerPoly
5.3-2 InfoCollectingPPowerPoly

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