Degrees of high-dimensional subvarieties of determinantal varieties
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- by B. A. Sethuraman PDF
- Proc. Amer. Math. Soc. 126 (1998), 9-14 Request permission
Abstract:
Let $n = p^ab$, where $p$ is a prime, and $\text {g.c.d. }(p,b)=1$. In $\mathbf {P}^{n^2-1}$, let $X_r$ be the variety defined by $\text {rank} ((x_{i,j})) \le n-r$. We show that any subvariety of $X_r$ of codimension less than $p^ar$ must have degree a multiple of $p$. We also show that the bounds on the codimension in our results are strict by exhibiting subvarieties of the appropriate codimension whose degrees are prime to $p$.References
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Additional Information
- B. A. Sethuraman
- Affiliation: Department of Mathematics, California State University, Northridge, California 91330
- Email: al.sethuraman@csun.edu
- Received by editor(s): March 8, 1996
- Additional Notes: Supported in part by an N.S.F. grant.
- Communicated by: Ron Donagi
- © Copyright 1998 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 126 (1998), 9-14
- MSC (1991): Primary 14M12
- DOI: https://doi.org/10.1090/S0002-9939-98-04470-0
- MathSciNet review: 1459148