Lecture Room B, 4th Floor, The 3rd General Building, NTHU
(清華大學綜合三館 4樓B演講室)
The Quotient Problem for Entire Functions
Ji Guo (National Tsing Hua University)
Abstract:
Let
and
be linear recurrence sequences. It is a well-known Diophantine problem to decide the finiteness of the set
of natural numbers such that their ratio
is an integer. In this paper we study an analogue of such a divisibility problem in the complex situation.
Namely,
we are concerned with the divisibility problem (in the sense of complex entire functions) for two sequences
and
, where the
and
are nonconstant entire functions and the
and
are non-zero constants except that
can be zero. We will show that the set
of natural numbers such that
is an entire function is finite under the assumption that
is not constant for any non-trivial index set
.