A projective Gauss map associated with a hypersurface and a hyperplane.
Transnormal graphs
Osculating plane preserving diffeomorphisms.
Projections of transnormal twisted spheres
Space curves and their duals.
Locally Sierpinski Quotients.
A note on equichordal graphs
A correction to "A note on equichordal graphs" (Port. Math., 45(4) (1988), 363-368)
Simultaneous complements in n-spaces - an elementary proof
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