Abstract
We recall the concept of spear vector and introduce the new notion of spear set. They are both used as “leitmotiv” to give a unified presentation of the concepts of spear operator, lush operator, aDP, and other type of operators that will be introduced here. We collect some properties of spear sets and vectors, together with some (easy) examples of spear vectors.
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Kadets, V., Martín, M., Merí, J., Pérez, A. (2018). Spear Vectors and Spear Sets. In: Spear Operators Between Banach Spaces. Lecture Notes in Mathematics, vol 2205. Springer, Cham. https://doi.org/10.1007/978-3-319-71333-5_2
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DOI: https://doi.org/10.1007/978-3-319-71333-5_2
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