The aim of these lecture notes is to give an essentially self-contained introduction to the basic regularity theory for energy minimizing maps, including recent developments concerning the structure of the singular set and asymptotics on approach to the singular set. Specialized knowledge in partial differential equations or the geometric calculus of variations is not required; a good general background in mathematical analysis would be adequate preparation.

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Asher Ginsberg (1856-1927), also known as Ahad Ha-Am, was a prominent pre-state Zionist thinker and considered the founder of Cultural Zionism, fighting for what he described as "a Jewish state and not merely a state of Jews." This 1912 collection of essays, translated by Leon Simon, expresses his philosophy and beliefs on Zionism and other Jewish topics, helping the reader build an understanding of Ahad Ha-Am and his era.