Sachertorte Sachertorte Sachertorte () is a specific type of chocolate cake, or torte, invented by Austrian Franz Sacher in 1832 for Prince Wenzel von Metternich in Vienna, Austria. It is one of the most famous Viennese culinary specialties. December 5th is National Sachertorte Day in the United States. Recipes similar to that of the Sachertorte appeared as early as the 18th century, one instance being in the 1718 cookbook of Conrad Hagger, another individual represented in Gartler-Hickmann's 1749 "Tried and True Viennese Cookbook" ("Wienerisches bewährtes Kochbuch"). In 1832, Prince Wenzel von Metternich charged his personal chef with creating a special dessert
Proportional cake-cutting economically efficient, i.e., maximize the social welfare (defined as the sum of the utilities of all agents). For example, consider a cake which contains 500 gram chocolate and 500 gram vanilla, divided between two partners one of whom wants only the chocolate and the other wants only the vanilla. Many cake-cutting protocols will give each agent 250 gram chocolate and 250 gram vanilla. This division is proportional because each partner receives 0.5 of his total value so the normalized social welfare is 1. However, this partition is very inefficient because we could give all the chocolate to one partner and