Shing-Tung Yau, Harvard University The 1994 Groswald Lectures were presented by Shing-Tung Yau in Wachman Hall.April 11, 1994: Harmonic Maps and Applications in GeometryApril 12, 1994: Counting Rational Curves in Algebraic ManifoldsApril 13, 1994: Eigenvalues of the Laplacian