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Ramified coverings of nonorientable surfaces by orientable surfaces with prescribed boundary projection |
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| Authors: | G G Bil'chenko I R Kayumov S R Nasyrov M F Sadykov |
| Institution: | (1) Kazan State University, USSR;(2) N. G. Chebotarev Mathematics and Mechanics Institute, Kazan State University, USSR |
| Abstract: | |
| Keywords: | ramified coverings orientable surfaces factorization in a free group |
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