A particularly challenging context for dimensionality reduction is multivariate circular data, that is, data supported on a torus. Such kind of appears, example, in the analysis various phenomena environmental sciences and astronomy, as well molecular structures. This article introduces Scaled Torus Principal Component Analysis (ST-PCA), novel approach to perform with toroidal data. ST-PCA find...

In a previous paper, we proposed that ud~du~ exotic mesons, comprised of even number quarks and antiquarks, form QCD gas fills space further method to determine the effective mass based on pseudo-first order ? decay reaction kinetics. second if density black hole ergospheres grows in time hence their ergoregions act as matter reactors break antimatter symmetry by trapping particles. this sugges...