Differential geometry of non-transversal intersection curves of three parametric hypersurfaces in Euclidean 4-space
Affiliation:
1. Department of Economics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0508, USA;2. Department of Economics, University of Wisconsin, Madison, 1180 Observatory Drive, Madison, WI 53706-1393, USA