Abstract
A new method to construct semi-copulas is introduced. These semi-copulas are called focal semi-copulas and their construction is based on linear interpolation on segments connecting the diagonal of the unit square with two focal points. Several classes of semilinear semi-copulas, such as lower semilinear semi-copulas, upper semilinear semi-copulas, ortholinear semi-copulas and biconic semi-copulas with a given diagonal section, turn out to be special cases of focal semi-copulas. Subclasses of focal semi-copulas, such as focal (quasi-)copulas are characterized as well.
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Jwaid, T., De Baets, B. & De Meyer, H. Focal Copulas: A Common Framework for Various Classes of Semilinear Copulas. Mediterr. J. Math. 13, 2911–2934 (2016). https://doi.org/10.1007/s00009-015-0664-6
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DOI: https://doi.org/10.1007/s00009-015-0664-6