Schwarz Stein Schwarz Stein Schwarz Stein is a Japanese visual kei electronic music duo formed by Hora (洞) and Kaya (迦夜) in 2001 (as "Rudolf Steiner"), who disbanded in 2004 and regrouped in 2014. During its first three years of activity, the group consisted of Kaya on vocals (ex-Isola) and Hora (ex-Velvet Eden) as keyboardist and programmer. The two originally worked together under the alias Rudolf Steiner until their signing to ex-Malice Mizer guitarist Mana's record label Midi:Nette. Upon their 're-formation', Mana discarded the name Rudolf Steiner and christened the duo "Schwarz Stein" (pseudo-German for "Black Stone"). Prior to their name change,
Hermann Schwarz Hermann Schwarz Karl Hermann Amandus Schwarz (; 25 January 1843 – 30 November 1921) was a German mathematician, known for his work in complex analysis. Schwarz was born in Hermsdorf, Silesia (now Jerzmanowa, Poland). On 30 June 1912 he married Marie Kummer, who was the daughter to the mathematician Ernst Eduard Kummer and Ottilie née Mendelssohn (a daughter of Nathan Mendelssohn's and granddaughter of Moses Mendelssohn). Schwarz and Kummer had six children, including his daughter Emily Schwarz. Schwarz originally studied chemistry in Berlin but Ernst Eduard Kummer and Karl Theodor Wihelm Weierstrass persuaded him to change to mathematics. He received