a1 Uludağ Universitesi; Fen-Edebiyat Fakültesi, Matematik Bölümü, Görükle Kampüsü, Bursa, Turkey
a2 Department of Pure Mathematics, the University of Leeds Leeds, LS2 9JT, England
Let M be a smooth m-dimensional submanifold in (m + d)-dimensional Euclidean space m+d For x M and a non-zero vector X in TXM, we define the (d + l)-dimensional affine subspace E(x, X) ofm+d by
(Received June 21 1993)
1 The first author is supported by Uludağ University in Turkey.