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Full signature invariants for  |
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| Authors: | Stefan Friedl |
| Institution: | Department of Mathematics, Ludwigs-Maximilian University, Theresienstrasse 39, 80333 München, Germany |
| Abstract: | Let  be a number field closed under complex conjugation. Denote by  the Witt group of hermitian forms over  . We find full invariants for detecting non-zero elements in  . This group plays an important role in topology in the work done by Casson and Gordon. |
| Keywords: | $L$--groups knot theory |
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