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math.AT2022
On Gelfand and MacPherson's combinatorial formula for Pontrjagin classes
Olakunle Abawonse, Laura Anderson
In 1992 Gelfand and MacPherson gave a local and combinatorial formula for the Pontrjagin classes of a differential manifold. We give an expanded version of their discussion and hig…
math.AT2022
Spaces of flattenings of spheres
Olakunle S Abawonse
The spaces of flattenings of a simplicial sphere played a key role in the study of existence and uniqueness of differentiable structures on a simplicial sphere. In this paper, we w…