# Article

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Keywords:
locally convex space; $\text{\rm H}$-locally convex space; numerical range; spectrum
Summary:
The spatial numerical range for a class of operators on locally convex space was studied by Giles, Joseph, Koehler and Sims in [3]. The purpose of this paper is to consider some additional properties of the numerical range on locally convex and especially on $\text{\rm H}$-locally convex spaces.
References:
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[7] Kramar E.: Linear operators in $H$-locally convex spaces. ibid. 26 (1981), 63-77. MR 0616023 | Zbl 0457.46002
[8] Precupanu T.: Sur les produits scalaires dans des espaces vectoriels topologiques. ibid. 13 (1968), 83-93. MR 0235398 | Zbl 0155.45201

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