The Importance Of Morse Theory

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An American mathematician Harold Calvin Marston Morse, formulated a famous theory which stands as one of the landmarks of 20th century mathematics, and generated tremendous strides in variational analysis and in other related fields (Themistocles. M, 1983, p. 3). He is best known for his work on the calculus of variations where he introduced the technique in the field of global analysis, now known as Morse Theory. His theory concerned with the algebraic topology, the Betti numbers which used to distinguish topological spaces based on the connectivity of n-dimensional simplicial complexes. Another kind of quantities is the set of critical points of the function, separated into connected sets that are classified analytically and algebraically or by local homological properties (Pitcher, 1994, p. 223). In the most elementary version, these are isolated non-degenerate critical points that are classified by index and are counted (Pitcher, 1994, p. 224). The relation in general is group theoretic but in elementary case, the Morse inequalities relate the Betti numbers and the numbers of critical points of various indices (Pitcher, 1994, p. 224).

The role that Morse theory played in the study of various problems of pure and applied mathematics is well-known (Themistocles. M, 1983, p. 8). Not only he made the single greatest contribution of American mathematics from this theory, he also wrote papers and books on a whole range of topics including on minimal surfaces, theory of functions of a complex variable, papers on differential topology, mathematical physics and on dynamical systems. His theory had a tremendous impact in many areas of Mathematics.

The Morse theory of critical points arose at approximately the beginning of the twentiet...

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...such abrupt changes in a system’s behavior is that we usually observe a dynamical system when it’s at or near its steady-state, or equilibrium, position (Casti, 1996, p. 116). When critical points are non-degenerate, Morse’s Theorem applies (Casti, 1996, p. 108).
There are a number of classical applications of Morse theory, including counting geodesics on a Riemann surface and determination of the topology of a Lie group (Bott 1960, Milnor 1963) (Eric W). Morse theory has received much attention in the last two decades as a result of the paper by Witten (1982) which relates Morse theory to quantum field theory and also directly connects the stationary points of a smooth function to differential forms on the manifold (Eric W). Morse’s achievement in mathematics is singular and monumental, and will remain visible for years to come (Themistocles. M, 1983, p. 3).

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