| Autor: |
Cimpric, Jakob, Helton, J. William, McCullough, Scott, Nelson, Christopher |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Electronic Journal of Linear Algebra, 30 (2015), 19-50 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.13001/1081-3810.2901 |
| Popis: |
Let F denote either the real or complex field. An ideal I in the free *-algebra F in g freely noncommuting variables and their formal adjoints is a *-ideal if I = I*. When a real *-ideal has finite codimension, it satisfies a strong Nullstellensatz. Without the finite codimension assumption, there are examples of such ideals which do not satisfy, very liberally interpreted, any Nullstellensatz. A polynomial p in F is analytic if it is a polynomial in the variables {x} only; that is if p in F. As shown in this article, *-ideals generated by analytic polynomials do satisfy a natural Nullstellensatz and those generated by homogeneous analytic polynomials have a particularly simple description. The article also connects the results here for *-ideals to the literature on Nullstellensatz for left ideals in *-algebras generally and in F in particular. It also develops the concomitant general theory of *-ideals in general *-algebras. |
| Databáze: |
arXiv |
| Externí odkaz: |
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