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C.F.G
  • Member for 8 years, 8 months
  • Last seen more than a month ago
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Old books you would like to have reprinted with high-quality typesetting
Are you still doing the Adams book?
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Algebraic topology beyond the basics: any texts bridging the gap?
Dear Professor @PeterMay: Is the offer for mistake-catcher still available? :)
accepted
Why non closed differential forms do not play important role for the topology of a manifold?
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Why non closed differential forms do not play important role for the topology of a manifold?
@user2520938: By "as you point out yourself" you meant the firs itemized case? i.e. the works of Sullivan?
asked
Why non closed differential forms do not play important role for the topology of a manifold?
answered
Is the meaning of "irreducible manifold", "not reducible to other manifold"?
accepted
Closed manifolds of nonnegative curvature operator are symmetric spaces
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Positive sectional curvature does not imply positive definite curvature operator?
added 118 characters in body
awarded
 Announcer
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De Rham decomposition theorem, generalisations and good references
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Surfaces in $\mathbb R^3$ with negative curvature bounded away from zero
edited body
awarded
 Cleanup
revised
Closed manifolds of nonnegative curvature operator are symmetric spaces
rolled back to a previous revision
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Is the meaning of "irreducible manifold", "not reducible to other manifold"?
@RyanBudney: You said that in high dimensions irreducible manifolds do not exist. But I have seen many theorems contains "n-dimensional irreducible Riemannian symmetric spaces". Is this different from irreducible manifold?
awarded
 Yearling
reviewed
Approve
Closed manifolds of nonnegative curvature operator are symmetric spaces
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Closed manifolds of nonnegative curvature operator are symmetric spaces
@JeffreyCase: I am not sure about the statement and I just quoted it from the books and papers. Fell free to correct the post.
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Closed manifolds of nonnegative curvature operator are symmetric spaces
@JeffreyCase: I see, but above theorem says that "is isometric to" .
answered
Positive sectional curvature does not imply positive definite curvature operator?
answered
Closed manifolds of nonnegative curvature operator are symmetric spaces
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