  In this paper, we give a new characterization of the split-complex numbers as
a vector space $LC_2= \{xI+yE : x,y \in \mathbb{R},\, E^2=I \}$ of operators,
where $I$ is the identity operator and $E$ is the unit shift operator that are
operating on the space $\mathbb{P}_2$ of all real-valued $2$-periodic
functions. We also characterize the field of the complex number $\mathbb{C}=
\{x+yi: x, y \in \mathbb{R}, i^2 =-1 \}$ as the space of linear operators of
the form $ \{xI+yE, E^2 = -I \}$, where $I$ is the identity operator and $E$
the unit shift operator that are regarded as operating on the vector space
$\mathbb{AP}_2 $ of all real-valued $2$-antiperiodic functions. In an analogy
to the polar form of complex numbers, we form the hyperbolic form of some
subset $ \mathcal{H} $ of the elements of $LC_2 $. We study some properties of
the elements of $LC_2$, the trace, the determinant, invertibility conditions,
and others. We study some elementary functions defined on subsets of $LC_2$ as
compared and contrasted with the usual complex functions. We study properties
like continuity, differentiability and define the holomorphic condition of
$LC_2$ functions in a different sense than complex functions. We establish the
line integrals of the vector-valued functions in $LC_2$ and compare them
against the well known results for complex functions of a complex variable.
