This paper is an example-based demonstration of our initial results on the
formal specification of programs written in the computer algebra language
MiniMaple (a substantial subset of Maple with slight extensions). The main goal
of this work is to define a verification framework for MiniMaple. Formal
specification of MiniMaple programs is rather complex task as it supports
non-standard types of objects, e.g. symbols and unevaluated expressions, and
additional functions and predicates, e.g. runtime type tests etc. We have used
the specification language to specify various computer algebra concepts
respective objects of the Maple package DifferenceDifferential developed at our
institute
