24 citations · 63 across the 14 of their papers we have counts for
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math.GN2018★ 3 cited
Difference hierarchies and duality with an application to formal languages
Célia Borlido, Mai Gehrke, Andreas Krebs +1
The notion of a difference hierarchy, first introduced by Hausdorff, plays an important role in many areas of mathematics, logic and theoretical computer science such as descriptiv…
cs.LO2018★ 1 cited
Forest Categories
Howard Straubing
We extend Tilson's theory of the algebra of finite categories, in particular, the Derived Category Theorem, to the setting of forest algebras. As an illustration of the usefulness…