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Recently changes: High codimension links Embeddings of k-complexes in 2k-manifolds and minimum rank of partial symmetric matrices Knots, i.e. embeddings of spheres Intersection form Embeddings of manifolds with boundary: classification Exotic spheres Fundamental groups of 3-dimensional spherical space forms 2-manifolds Embeddings in Euclidean space: an introduction to their classification Embeddings just below the stable range: classification

1 Welcome to the Manifold Atlas Project

The Manifold Atlas is an evolving and scientifically quotable online resource for researchers and students interested in manifolds. It contains four chapters.

• Manifolds: pages about constructions of manifolds and the invariants and properties of these manifolds.
• Problems: pages listing open questions about manifolds, their status and history.
• Theory: pages summarising useful general facts and theories about manifolds.
• History: pages about the history of the study of manifolds.

2 Search the Manifold Atlas

You will find the articles listed alphabetically by clicking each chapter. A full text search is available: a quick version lies in the box to the left of screen. For more information please read about the Manifold Atlas.

3 Write in the Manifold Atlas

• Create a new open-edit page.
• Create a new author-based page.
• Join the discussion for a page.
• Add to or edit existing articles.

Orientation for authors gives information about writing in the atlas. The community portal is a general discussion forum.

4 Register for the Manifold Atlas

Please register with a verified email address in order to write and discuss in the Manifold Atlas.