Positive sectional curvatures does not imply positive Gauss-Bonnet integrand

Positive sectional curvatures does not imply positive Gauss-Bonnet integrand
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by Robert Geroch PDF

Proc. Amer. Math. Soc. 54 (1976), 267-270 Request permission

An example is given, in dimension six, of a curvature tensor having positive sectional curvatures and negative Gauss-Bonnet integrand.

References

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