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2025-11-20 13:32:33 UTC
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Anton Sherwood on Nostr: The Grassmannian is the space of orthographic projections from a Euclidean space to ...

The Grassmannian is the space of orthographic projections from a Euclidean space to one of lower dimension; the set of k-dimensional planes passing through the origin in E^n. By forbidden arc (my mistake, it has more than one degree of freedom) I mean a continuous set of projections that make the images of some elements collide.