Cohomological dimension and arithmetical rank of some determinantal ideals
Let M be a (2 × n) non-generic matrix of linear forms in a polynomial ring. For large classes of such matrices, we compute the cohomological dimension (cd) and the arithmetical rank (ara) of the ideal I_2(M) generated by the 2-minors of M. Over an algebraically closed field, any (2×n)-matrix of line...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Università degli Studi di Catania
2015-05-01
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| Series: | Le Matematiche |
| Subjects: | |
| Online Access: | http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/1238 |