The range of the bigenus is one of the unsolved problems concerning smooth complex projective regular threefolds of general type with : The examples in the literature have . In the present paper we present a non-singular threefold with ; ; the bicanonical map is stably birational.
@article{BUMI_2009_9_2_3_607_0, author = {M. Cristina Ronconi}, title = {A Regular Threefold of General Type with $p\_{g} = 0$ and $P\_{2} = 6$}, journal = {Bollettino dell'Unione Matematica Italiana}, volume = {2}, year = {2009}, pages = {607-621}, zbl = {1184.14069}, mrnumber = {2569294}, language = {en}, url = {http://dml.mathdoc.fr/item/BUMI_2009_9_2_3_607_0} }
Ronconi, M. Cristina. A Regular Threefold of General Type with $p_{g} = 0$ and $P_{2} = 6$. Bollettino dell'Unione Matematica Italiana, Tome 2 (2009) pp. 607-621. http://gdmltest.u-ga.fr/item/BUMI_2009_9_2_3_607_0/
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