Hubie Chen | AC Group | TU Wienhttps://ac.tuwien.ac.at/team/hubie-chen/Hubie ChenHugo Blox Builder (https://hugoblox.com)en-usSun, 01 Jan 2017 00:00:00 +0000https://ac.tuwien.ac.at/media/logo_hu10234977157890132473.pngHubie Chenhttps://ac.tuwien.ac.at/team/hubie-chen/How many variables are needed to express an existential positive query?https://ac.tuwien.ac.at/publication/how-many-variables-are-needed-to-express-an-existential-positive-query/Sun, 01 Jan 2017 00:00:00 +0000https://ac.tuwien.ac.at/publication/how-many-variables-are-needed-to-express-an-existential-positive-query/The complexity of equivalence, entailment, and minimization in existential positive logichttps://ac.tuwien.ac.at/publication/the-complexity-of-equivalence-entailment-and-minimization-in-existential-positive-logic/Thu, 01 Jan 2015 00:00:00 +0000https://ac.tuwien.ac.at/publication/the-complexity-of-equivalence-entailment-and-minimization-in-existential-positive-logic/The Complexity of Width Minimization for Existential Positive Querieshttps://ac.tuwien.ac.at/publication/the-complexity-of-width-minimization-for-existential-positive-queries/Wed, 01 Jan 2014 00:00:00 +0000https://ac.tuwien.ac.at/publication/the-complexity-of-width-minimization-for-existential-positive-queries/Generic expression hardness results for primitive positive formula comparisonhttps://ac.tuwien.ac.at/publication/generic-expression-hardness-results-for-primitive-positive-formula-comparison-2/Tue, 01 Jan 2013 00:00:00 +0000https://ac.tuwien.ac.at/publication/generic-expression-hardness-results-for-primitive-positive-formula-comparison-2/On the Expression Complexity of Equivalence and Isomorphism of Primitive Positive Formulashttps://ac.tuwien.ac.at/publication/on-the-expression-complexity-of-equivalence-and-isomorphism-of-primitive-positive-formulas/Sun, 01 Jan 2012 00:00:00 +0000https://ac.tuwien.ac.at/publication/on-the-expression-complexity-of-equivalence-and-isomorphism-of-primitive-positive-formulas/Generic Expression Hardness Results for Primitive Positive Formula Comparisonhttps://ac.tuwien.ac.at/publication/generic-expression-hardness-results-for-primitive-positive-formula-comparison/Sat, 01 Jan 2011 00:00:00 +0000https://ac.tuwien.ac.at/publication/generic-expression-hardness-results-for-primitive-positive-formula-comparison/