Poincaré cobordism exact sequences and characterisation
Poincaré cobordism exact sequences and characterisation
Exact sequences connecting oriented and unoriented cobordism groups of Poincare duality spaces, analogous to Rohlin's and Wall's exact sequences in differential and piecewise linear categories, are established and characterisation of elements of Poincare cobordism groups (both oriented and unoriented) in terms of spherical characteristic numbers and index are given.100 HIMADRI …