Sur un problème de P. Erdös
Andrzej Schinzel (1958)
Colloquium Mathematicae
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Andrzej Schinzel (1958)
Colloquium Mathematicae
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Sophie Piccard (1959)
Annales scientifiques de l'École Normale Supérieure
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Alain Robert (1995)
Annales mathématiques Blaise Pascal
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Ota Fischer (1935)
Časopis pro pěstování matematiky a fysiky
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Josef Kaucký (1964)
Matematicko-fyzikálny časopis
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Mireille Martin-Deschamps (2004)
Collectanea Mathematica
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The postulation of Aritméticamente Cohen-Macaulay (ACM) subschemes of the projective space PkN is well known in the case of codimension 2. There are many different ways of recording this numerical information: numerical character of Gruson/Peskine, h-vector, postulation character of Martin-Deschamps/Perrin... The first aim of this paper is to show the equivalence of these notions. The second and most important aim, is to study the postulation of codimension 3 ACM subschemes of PN. We...