Jump to content

Matrix factorization of a polynomial

From Wikipedia, the free encyclopedia
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

In mathematics, a matrix factorization of a polynomial is a technique for factoring irreducible polynomials with matrices. David Eisenbud proved that every multivariate real-valued polynomial p without linear terms can be written as AB = pI, where A and B are square matrices and I is the identity matrix.[1] Given the polynomial p, the matrices A and B can be found by elementary methods.[2]

Example

The polynomial x2 + y2 is irreducible over R[x,y], but can be written as

References

  1. ^ Eisenbud, David (1980-01-01). "Homological algebra on a complete intersection, with an application to group representations". Transactions of the American Mathematical Society. 260 (1): 35–64. doi:10.1090/S0002-9947-1980-0570778-7. ISSN 0002-9947.
  2. ^ Crisler, David; Diveris, Kosmas (2016-10-21). "Matrix Factorizations of Sums of Squares Polynomials" (PDF). Northfield, Minnesota: St. Olaf College. Archived from the original (PDF) on 2020-07-06.