Source: Osaka J. Math. Volume 43, Number 1
(2006), 121-129.
We investigate closed Riemannian 3-manifolds which satisfy
an extremal condition. Using monopole equations and considering
the action of the covering transformations, we decide the
geometric structure of such 3-manifolds. As a result, we
characterize the geometry of 3-manifolds with monopole classes
whose dual Thurston norm is equal to one.
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