Arguedas T., V. José Echegaray, a Multi-Faceted Mathematician: Nobel Prize in Literature, an Outstanding Politician, Promoter of Spanish Physics and Mathematics at the End of the 20th Century and the Beginning of the 20th: José Echegaray, Un matemático polifacético: Premio Nobel Literatura, político destacadísimo, Impulsor De La física Y Mate española Al Final Del Siglo IXX Y De Principios Del XX. MEIJ 2019, 19.