  Recently, \"Ozarslan and Elidemir (2023) introduced a methodology for
constructing two-variable biorthogonal polynomial families with the help of
one-variable biorthogonal and orthogonal polynomial families. The primary
objective of the paper is to introduce novel class of two-variable biorthogonal
polynomials namley bivariate Jacobi Konhauser polynomials. We investigate
several fundamental properties of these polynomials including their
biorthogonality property, operational formula, generating function, and
integral representation. Furthermore, We inverstigate their images under the
Laplace transform, fractional integral and derivative operators. Corresponding
to these polynomials, we define the new type bivariate Jacobi Konhauser Mittag
Leffler (JKML) function and obtain the similar properties for them.
