Concepts
Exotic R4
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Concepts
Exotic R4
Smooth 4-manifold homeomorphic yet not diffeomorphic to Euclidean space
rare · Q2436606
Related cards · differentiable manifold
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Concepts
3-sphere
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Projective space
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Almost complex manifold
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Amplituhedron
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Symplectic manifold
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Pseudo-Riemannian manifold
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