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ModulesOfProjectiveDimensionTwo on DyckPath ​

The indecomposable modules of projective dimension two.

On DyckPath

FindStat's St001232 is stated, and crawled, only for algebras of global dimension at most two; the count is the same definition on every path.

Called as CombinatorialStat(x, "ModulesOfProjectiveDimensionTwo"). The head's page has its examples.

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FindStat St001232

The number of indecomposable modules with projective dimension 2 for Nakayama algebras with global dimension at most 2.

ObjectValue
[1,0]0
[1,0,1,0]1
[1,1,0,0]0
[1,0,1,1,0,0]2
[1,1,0,0,1,0]1
[1,1,0,1,0,0]2
[1,1,1,0,0,0]0
[1,0,1,1,0,0,1,0]3

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001232 has the rest.