Nature

Quadratic Forms and their Classification by Means of Invariant Factors The Axioms of Projective Geometry The Axioms of Descriptive Geometry

THESE are Nos. 3, 4, and 5 of the Cambridge Tracts in Mathematics and Mathematical Physics, which are intended to help students by providing them with brief and readable introductions to mathematical ...
JSTOR Daily

Distribution of Multivariate Quadratic Forms under Certain Covariance Structures

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 ...
JSTOR Daily

The optimization problems of a quadratic Hermitian matrix-valued function with the constraint of matrix equations

This is a preview. Log in through your library . Abstract Let Ω = {X ∈ ℂn×p AX = B, XH = K, and AA†B = B,KH†H = K, AK = BH}, and let f(X) = (XC + D)M(XC + D)∗ − G be a given quadratic Hermitian matrix ...
Nature

Analysis and interpretation of quadratic models of receptive fields

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 ...