Geodesic
Equivariant sufficiency and stability
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 4 (2018), pp. 56-60

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An equivariant version of Tougerone's finite determinacy theorem, along with a criterion for the stability of an invariant germ are proved. 
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     author = {I. A. Proskurnin},
     title = {Equivariant sufficiency and stability},
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     url = {http://geodesic.mathdoc.fr/item/VMUMM_2018_4_a9/}
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I. A. Proskurnin. Equivariant sufficiency and stability. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 4 (2018), pp. 56-60. http://geodesic.mathdoc.fr/item/VMUMM_2018_4_a9/