| Visiting address | Universiteit van Amsterdam
Faculty of Science Korteweg-de Vries Institute for Mathematics Room C4.139 Science Park 904 1098 XH Amsterdam The Netherlands |
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| Postal Address | PO box 94248 1090 GE Amsterdam |
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| Telephone | +31 20 5258486 | |
| Telefax | +31 20 5257820 | |
| A.J.P.Heck@uva.nl |