On~degeneration of $M$-varieties
Matematičeskie zametki, Tome 59 (1996) no. 3, pp. 396-401.

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Here we give here an estimate for the total Betti number of a degenerate fiber of an analytic function on a real variety. Our estimate involves homology groups and the local monodromy action on nondegenerate fibers of complexification of this function.
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V. A. Krasnov. On~degeneration of $M$-varieties. Matematičeskie zametki, Tome 59 (1996) no. 3, pp. 396-401. http://geodesic.mathdoc.fr/item/MZM_1996_59_3_a7/

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