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math.AT2025
The Yang indices of Grassmannians
James Dibble
An elementary combinatorial technique for computing lower bounds for the Yang indices of real Stiefel manifolds and oriented real Grassmannians is described. As a demonstration, it…
math.MG2025
Distortion from spheres into Euclidean spaces
James Dibble
Any function from a round -dimensional sphere of radius into -dimensional Euclidean space must distort the metric additively by at least $\displaystyle \frac{πr}{1 + \sqr…