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We consider a question of T. Jech and K. Prikry that asks if the existence of a precipitous filter implies the existence of a normal precipitous filter. The aim of this paper is to improve a result of [3] and to show that measurable cardinals of a higher order rather than just measurable cardinals are necessary in order to have a model with a precipitous(More)
We describe how hierarchical ontologies are used for classifying products, as well as for answering queries. For classifying and scoring product descriptions and queries in an electronic-commerce search engine, we make use of declarative hypernym/hyponym and meronym/holonym hierarchies, such as the sense hierarchies provided by WordNet. Retrieval is also(More)
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