
Summary: We obtain a list of all simple classes of singularities of function germs with respect to the quasi cusp equivalence relation. We discuss its connection with the singularities of Lagrangian projections in presence of a cuspidal edge. We also describe the bifurcation diagrams and caustics of simple quasi cusp singularities.
Critical points of functions and mappings on manifolds, bifurcation diagram, Affine differential geometry, cusp, quasi border singularities, Classification; finite determinacy of map germs, caustic, Lagrangian projection
Critical points of functions and mappings on manifolds, bifurcation diagram, Affine differential geometry, cusp, quasi border singularities, Classification; finite determinacy of map germs, caustic, Lagrangian projection
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