Bach festival on which ψ is trivial. The theory of Prym varieties was dormant for a long time, until revived by David Mumford around 1970. It now plays a substantial role in some contemporary theories, for example of the Kadomtsev–Petviashvili equation. One advantage of the method is that it allows one to apply the theory of curves to the study of a wider class of abelian varieties than Jacobians. For example, principally polarized abelian varieties (p.p.a.v.'s) of dimension > 3 are not generally Jacobians, but all p.p.a.v.'s of dimension 5 or less are Prym varieties. It is for this 	Prym variety
4181629	reason that p.p.a.v.'s are fairly well understood up to dimension 5. Prym variety In mathematics, the Prym variety construction (named for Friedrich Prym) is a method in algebraic geometry of making an abelian variety from a morphism of algebraic curves. In its original form, it was applied to an unramified double covering of a Riemann surface, and was used by F. Schottky and H. W. E. Jung in relation with the Schottky problem, as it is now called, of characterising Jacobian varieties among abelian varieties. It is said to have appeared first in the late work of Riemann, and 	Prym variety
4181630	Bach festival Bach festival A Bach festival is a music festival held to celebrate the memory of the German composer Johann Sebastian Bach (1685–1750). Various locations throughout the world hold festivals dedicated to Bach. A notable example is the Bachfest Leipzig, held each year in the city of Leipzig, where the composer worked as Thomaskantor for the last 27 years of his life. Historical festivals. Baldwin Wallace Bach Festival. The Baldwin Wallace Conservatory of Music at Baldwin Wallace University is home to the BW Bach Festival, the oldest collegiate Bach festival in the nation. The festival was founded in 1932 by Professor 	Bach festival
4181631	Albert Riemenschneider (longtime director of the College Conservatory) and his wife Selma. The then Baldwin-Wallace Festival Choir and Orchestra presented the first Bach Festival in June 1933 and has continued since then. The oldest Bach Festival, The Bethlehem, and Baldwin Wallace performed together for BW's 75th anniversary of the festival. Winter Park Bach Festival. The Bach Festival Society was founded in 1935 at Rollins College to commemorate the 250th anniversary of Johann Sebastian Bach's birth by presenting the composer's orchestral and choral music to the public for its enlightenment, education, pleasure, and enjoyment" at Knowles Memorial  Chapel. Isabelle Sprague-Smith, a former New York artist and school principal, was the president and driving force behind the Bach Festival from 1935 until her death in 1950. At Sprague-Smith's death, the future of the Bach Festival was uncertain. Rollins President Hugh F. McKean (husband to Jeannette Genius McKean) asked John M. Tiedtke, the treasurer of the College, to fulfill the obligation and he accepted. Tiedtke served as Chairman of the Board of Trustees until his death in December 2004. The festival has been presented each year since 1935, and has expanded to a multi-week event  including chamber music, lectures, master classes, and community events. Bach festival A Bach festival is a music festival held to celebrate the memory of the German composer Johann Sebastian Bach (1685–1750). Various locations throughout the world hold festivals dedicated to Bach. A notable example is the Bachfest Leipzig, held each year in the city of Leipzig, where the composer worked as Thomaskantor for the last 27 years of his life. Historical festivals. Baldwin Wallace Bach Festival. The Baldwin Wallace Conservatory of Music at Baldwin Wallace University is home to the BW Bach Festival, the oldest collegiate Bach festival in the