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{\bf Xun-Tuan Su and Yi Wang}
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{\bf On Unimodality Problems in Pascal's Triangle}
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Many sequences of binomial coefficients share various unimodality
properties. In this paper we consider the unimodality problem of a
sequence of binomial coefficients located in a ray or a transversal
of the Pascal triangle. Our results give in particular an
affirmative answer to a conjecture of Belbachir {\it et al} which
asserts that such a sequence of binomial coefficients must be
unimodal. We also propose two more general conjectures.



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