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ensure accuracy. Biographical Memoirs: Volume 65 March 24,
1890-June 22, 1977 BY EVERETT PITCHER THE SINGLE MOST
SIGNIFICANT contribution of Marston Morse to mathematics and his
undoubted claim to enduring fame lie in the area of critical
point theory, also known because of the force and scope of his
contribution as Morse theory. His work in this field was
initiated in the paper (1925) and was expanded and elaborated in
several subsequent papers, particularly (1928). He further
developed and organized the material in his Colloquium Lectures,
presented before the American Mathematical Society in 1931 and
published by the society in 1934 as vol. 18 in its series
Colloquium Publications (1934,3). It was paper (1928) that was
specifically cited when he was awarded the Bôcher Prize of the
American Mathematical Society in 1933. He retu