## Functiones et Approximatio Commentarii Mathematici

### The Phragmén Lindelöf condition for evolution for quadratic forms

#### Abstract

Let $P \in \mathbb{C}[\tau, \zeta_1, \ldots, \zeta_n]$ be a quadratic polynomial for which the $\tau$-variable is non-characteristic. We characterize when the zero-variety $V(P)$ of $P$ satisfies the Phragmén-Lindelöf condition $PL(\omega)$ or equivalently when the pair $(\mathbb{R}_x^n, \mathbb{R}_\tau \times \mathbb{R}_x^n)$ is of evolution in the class ${\mathcal E}_\omega$ for the partial differential operator $P(D)$ with symbol $P$.

#### Article information

Source
Funct. Approx. Comment. Math., Volume 44, Number 1 (2011), 111-131.

Dates
First available in Project Euclid: 30 March 2011

https://projecteuclid.org/euclid.facm/1301497749

Digital Object Identifier
doi:10.7169/facm/1301497749

Mathematical Reviews number (MathSciNet)
MR2807901

Zentralblatt MATH identifier
1223.32020

#### Citation

Boiti, Chiara; Meise, Reinhold. The Phragmén Lindelöf condition for evolution for quadratic forms. Funct. Approx. Comment. Math. 44 (2011), no. 1, 111--131. doi:10.7169/facm/1301497749. https://projecteuclid.org/euclid.facm/1301497749

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