There is a unique A-moduli stratum of plane-to-plane germs which forms an open dense subset in the K-orbit of I2,3 : (x 2 + y 3 , xy). We describe explicitly the bifurcation diagram of its topologically Aeversal unfolding. Two geometric applications to parabolic crosscaps and parabolic umbilic are presented.2000 Mathematics Subject Classification. 57R45, 53A05, 53A15.
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