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Exact Solutions and Scalar Fields in Gravity - Instituto Avanzado de ...

Exact Solutions and Scalar Fields in Gravity - Instituto Avanzado de ...

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Theta formula for the Ernst potential of the rigidly rotat<strong>in</strong>g disk of dust<br />

are <strong>de</strong>f<strong>in</strong>ed <strong>and</strong> hence<br />

For the calculation of the moduli <strong>and</strong> of <strong>in</strong>tegrals of the<br />

type, us<strong>in</strong>g (34),<br />

<strong>and</strong> the <strong>in</strong>tegrals <strong>and</strong> are used. The only imag<strong>in</strong>ary<br />

contribution <strong>in</strong> this context is given by<br />

The equations (44) <strong>and</strong> (45) follow immediately from what prece<strong>de</strong>s <strong>and</strong><br />

(46) is a consequence of them.<br />

Calculation of<br />

Due to the equations (7),(8) <strong>and</strong> (42) the follow<strong>in</strong>g l<strong>in</strong>ear systems are to<br />

be solved:<br />

With the solution is<br />

45

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