Geodesic
On the versal discriminant of $J_{k,0}$ singularities
Annales Polonici Mathematici, Tome 63 (1996) no. 1, pp. 89-99

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It is well known that the versal deformations of nonsimple singularities depend on moduli. The first step in deeper understanding of this phenomenon is to determine the versal discriminant, which roughly speaking is an obstacle to analytic triviality of an unfolding or deformation along the moduli. The versal discriminant of the Pham singularity ($J_{3,0}$ in Arnold's classification) was thoroughly investigated by J. Damon and A. Galligo [2], [3], [4]. The goal of this paper is to continue their work and to describe the versal discriminant of a general $J_{k,0}$ singularity.
DOI : 10.4064/ap-63-1-89-99
Keywords: versal deformation, versal unfolding, moduli, liftable vector fields, local algebra, topological triviality 
Piotr Jaworski. On the versal discriminant of $J_{k,0}$ singularities. Annales Polonici Mathematici, Tome 63 (1996) no. 1, pp. 89-99. doi: 10.4064/ap-63-1-89-99
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