german sharp s in formula

[Reinhard Borek]

Hi,
how I can put a german sharp s in text-mode in a formula?

greetings, Reinhard
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[EMAIL PROTECTED]
Reinhard Borek
Exp. Phys I
Fachbereich Physik
Martin-Luther-Universität Halle-Wittenberg
Friedemann-Bach-Platz 6
06108 Halle/Saale