second order, two-point, Sturm-Liouville-type boundary value problems
on time scales.
Although this topic has received extensive attention
in recent years, we present some simple examples which show that
there are certain difficulties with the formulation of the
problem as usually used in the literature.
These difficulties can be avoided by some additional conditions on
the structure of the time scale, but we show that these are
unnecessary, since in fact a simple,
amended formulation of the problem avoids the difficulties.
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