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I will survey various results on applications and extensions of Hofer-Wysocki-Zehnder's polyfold theory: - fiber products of polyfold Fredholm sections - equivariant transversality - existence and obstructions - equivariant fundamental class -

Consider a space XX, such as a compact space of JJ-holomorphic stable maps with closed domain, that is the zero set of a Fredholm operator.

We develop a continuous version of Kasteleyn theory to show that partition functions for bead configurations on T_n may be expressed in terms of Fredholm determinants of certain operators on

23 Jan 2004: that. ‖K‖ 14 ‖etÃF̃ etÃ‖h2 O(h3).(2.1)Therefore ‖K‖ scales with h2, rather than with h in standard applications ofNeumann expansions to, say, Fredholm equations of the second

12 Mar 2004: The Fredholm alternative theorem states that (52). has a solution only if the homogeneous problem,XNk0. ... then there would be innitely many solutions by the. Fredholm solvability theory.

21 May 2005: Prove the Fredholm alternative: Letλ R, λ 6= 0, and let x0 H.

21 May 2005: b. aK(x,y)f(y)dyh(x) is a contraction. Deduce. that, for λ sufficiently small, the (Fredholm) integral equation.

21 Sep 2005: Evenmore ambitious goal is the analysis of highly oscillatory Fredholm equationsof the second kind.

22 Nov 2005: b. aK(x,y)f(y)dyh(x) is a contraction. Deduce. that, for λ sufficiently small, the (Fredholm) integral equation.

21 Apr 2006: We may therefore express the imaging process by the Fredholm integral,. ... x, y, z) = δ (xp) δ (z z0).Expressing the Fredholm integral of Equation 1 in terms of xp and yp, we obtaing (x, y, t) =. h (x′ cos θ y′