| A Lower Bound for the Heegaard Genera of Annulus Sum |
| Received:November 27, 2009 Revised:April 27, 2010 |
| Key Words:
genus distance annulus.
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| Fund Project:Supported by the Fundamental Research Funds for the Central Universities and the Key Grant of National Natural Science Foundation of China (Grant No.10931005). |
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| Abstract: |
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| Citation: |
| DOI:10.3770/j.issn:1000-341X.2011.04.002 |
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