Opuscula Mathematica
Opuscula Math. 31, no. 3 (), 303-315
http://dx.doi.org/10.7494/OpMath.2011.31.3.303
Opuscula Mathematica

Investigating the numerical range and q-numerical range of non square matrices



Abstract. A presentation of numerical ranges for rectangular matrices is undertaken in this paper, introducing two different definitions and elaborating basic properties. Further, we extend to the \(q\)-numerical range.
Keywords: numerical range, projectors, matrix norms, singular values.
Mathematics Subject Classification: 15A60, 15A18, 47A12, 47A30.
Cite this article as:
Aikaterini Aretaki, John Maroulas, Investigating the numerical range and q-numerical range of non square matrices, Opuscula Math. 31, no. 3 (2011), 303-315, http://dx.doi.org/10.7494/OpMath.2011.31.3.303
 
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ISSN 1232−9274, e-ISSN 2300−6919, DOI http://dx.doi.org/10.7494/OpMath
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