Two-dimensional Lagrangian singularities and bifurcations of gradient lines II

Details Two-dimensional Lagrangian singularities and bifurcations of gradient lines II Two-dimensional Lagrangian singularities and bifurcations of gradient lines II

2007-03-30

arxiv.org/abs/math/0703917v1

J. Geo. Phys. 56/9 (2006), 1875-1892

Mathematics

Dynamical Systems

26 pages

Scientific paper

Motivated by mirror symmetry, we consider the Lagrangian fibration $\R^4\to\R^2$ and Lagrangian maps $f:L\hookrightarrow \R^4\to \R^2$, exhibiting an unstable singularity, and study how the bifurcation locus of gradient lines, the integral curves of $\nabla f_x$, for $x\in B$, where $f_x(y)=f(y)-x\cdot y$, changes when $f$ is slightly perturbed. We consider the cases when $f$ is the germ of a fold, of a cusp and, particularly, of an elliptic umbilic.

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