Use of convexity for finding pure variables in two-way data from mixtures

By Bjørn-Vidar Grande, R. Manne. 2000

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On rotational ambiguity in model‐free analyses of multivariate data (2006, methodology): “Other methods, such as SIMPLISMA [11] or other approaches to determine ’key variables’ [12] of the data set, typically estimates for the concentration profiles or component spectra.”
Studies on the adaptability of different Borgen norms applied in self‐modeling curve resolution (SMCR) method (2009, background): “It should be mentioned that a simple proof of the simplex property was already given by Grande and Manne [19], however it was only for two-component systems and without any clear formulations for more components.”