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Possible relation between pulsar rotation and evolution of magnetic inclination
The pulsar timing is observed to be different from predicted by a simple
magnetic dipole radiation. We choose eight pulsars whose braking index was
reliably determined. Assuming the smaller values of braking index are dominated
by the secular evolution of the magnetic inclination, we calculate the
increasing rate of the magnetic inclination for each pulsar. We find a possible
relation between the rotation frequency of each pulsar and the inferred
evolution of the magnetic inclination. Due to the model-dependent fit of the
magnetic inclination and other effects, more observational indicators for the
change rate of magnetic inclination are needed to test the relation.Comment: 4 pages, 3 figure
Virtual moduli cycles and Gromov-Witten invariants of algebraic varieties
We introduce a method of constructing the virtual cycle of any scheme
associated with a tangent-obstruction complex. We apply this method to
constructing the virtual moduli cycle of the moduli of stable maps from
n-pointed genus g curves to any smooth projective variety. As an application,
we give an algebraic definition of GW-invariants for any smooth projective
variety.Comment: 68 pages, Amstex. Revised version. It appeared in J. of Amer. Math.
Soc. Jan 9
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