Consider a mapping $F: \mathbf{R}^n \rightarrow \mathbf{R}^3 (n \geqslant 3)$ defined by an ordered triple of real-valued quadratic forms; if some linear combination ...

The Canadian Journal of Statistics / La Revue Canadienne de Statistique Necessary and sufficient conditions are given for the covariance structure of all the observations in a multivariate factorial ...

Research in neuroscience has seen a recent trend toward the extension of receptive field (RF) estimation techniques and theoretical principles from linear to non-linear models. This development has ...