Journal title
Le Matematiche

   
Home  /  Le Matematiche  /  Vol: 42 Núm: 1 Par: 0 (2086)  /  Article
ARTICLE
TITLE

Sulle sezioni iperpiane di una varietà proiettiva

SUMMARY

A result about curves in P3obtained by R. Strano is generalized to arbitrary subvarieties of Pn. A curve in P3of degree >4 not contained in a quadric surface is a complete intersection if its generic hyperplane section is a complete intersection: this result is also true, with no restrictions, for any locally C.M. Closed non-degenerate subscheme of Pn, n>3.

PAGES
pp. 211 - 218

 Articles related

Alberto Policriti    

An extension of results on the decidability of classes of formulas in set theory is proved. In particular a class of restricted quantified formulas is proved to be decidable also in the case in which the underlying axiomatic set theory does not contain t... see more

Revista: Le Matematiche

Grace Aspenson,Dustin Baker,Bryan Freyberg,Coy Schwieder    

Other than C9 there are 239 connected unicyclic graphs with exactly 9 edges. We use established graph labeling results to prove that every one of them decomposes the complete graph Kn if n = 0 or 1 (mod 18).


Jared Culbertson,Dan P. Guralnik,Peter F. Stiller    

We prove several results about chordal graphs and weighted chordal graphs by focusing on exposed edges. These are edges that are properly contained in a single maximal complete subgraph.  This leads to a characterization of chordal graphs via deleti... see more


Roland Lortz,Ingrid Mengersen    

For the Ramsey number r(Tn, Bm), where Tn denotes a tree of order n and Bm denotes the m-page book K2 + bar(K)m, it is known that r(Tn, Bm)=2n - 1 if n = 3m - 3. In case of n < 3m - 3,&n... see more


Jayson De Luna Tolentino,Reginaldo M. Marcelo,Mark Anthony C. Tolentino    

Let k = 2 be an integer and G be a connected graph of order at least 3. A twin k-edge coloring of G is a proper edge coloring of G that uses colors from Zk and that induces a proper vertex color... see more