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gap-packages / qpa

GAP package for quivers and path algebras
https://folk.ntnu.no/oyvinso/QPA/
GNU General Public License v2.0
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Bug in TrivialExtensionOfQuiverAlgebra. #7

Closed sunnyquiver closed 7 years ago

sunnyquiver commented 7 years ago

There is a bug in TrivialExtensionOfQuiverAlgebra. The bug is reported by Rene Marczinzik. The bug can be produced by calling the following sequence of commands:

A := NakayamaAlgebra([2],GF(3)); B := TrivialExtensionOfQuiverAlgebra(A); C := TrivialExtensionOfQuiverAlgebra(B); D := TrivialExtensionOfQuiverAlgebra(C);

sunnyquiver commented 7 years ago

The bug occurs due to the naming algorithm of the new arrows in the quiver of the trivial extension. This has been resolved by adding an extra label on the new arrows depending on how many times you take trivial extension of the trivial extension of ....