Weihnachtsbaum (Liszt) Weihnachtsbaum (Liszt) Weihnachtsbaum (English: "Christmas Tree"; French: "Arbre de Noël") is a suite of 12 pieces written by Franz Liszt in 1873–76, with revisions in 1881. The suite exists in versions for solo piano and piano four-hands. "Weihnachtsbaum" does not demand great virtuosity, and it has been described as a distant relation of Schumann's "Kinderszenen" and Debussy's "Children's Corner". It occupies an unusual place in Liszt's output, and it may be for these reasons that it has received relatively little attention from performers. Liszt dedicated "Weihnachtsbaum" to his first grandchild Daniela von Bülow (1860-1940; daughter of Cosima and Hans von
Emmanuel David Tannenbaum subsequently devoted his research to studying various problems in evolutionary dynamics using quasispecies models. His seminal work centered on the key question of the evolutionary advantages of sexual reproduction. Tannenbaum demonstrated a strong selective advantage for sexual reproduction with fewer and much less restrictive assumptions than previously considered. Closely related to this line of reasoning, was the original work by Tannenbaum and James Sherley on the immortal strand hypothesis. Tannenbaum also proposed a pioneering theory of why higher organisms need sleep. Towards the end of his life, he proposed a new approach to anti-stealth technology based on the theory of