Akira Yoshioka
Star Product and Several Star Functions
One parameter deformation of function is given by means of convergent star product,
where the deformation parameter varies in some domain of
The deformed functions are called {\it star functions}.
In this presentation, we discuss, as a simple case, a star product of functions of one variable,
and then the product becomes commutative and associative. Several concrete examples,
e.g., star Gamma function, are given together with their basic identities.
