1 : Head of the Rural Transformation and Sustainable Development Unit, Sahel and West Africa Club (SWAC/OECD), 2, rue André-Pascal, 75775 Paris, Cedex 16 ; Tel +33 1 45 24 19 82; e-mail: [email protected] 2 : Agricultural-economist, Rural Transformation and Sustainable Development Unit, Sahel and West Africa Club (SWAC/OECD), 2, rue André-Pascal, 75775 Paris, Cedex 16; Tel +33 1 45 24 ...

Recently the creation matrix, intimately related to the Pascal matrix and its generalizations, has been used to develop matrix representations of special polynomials, in particular Appell polynomials. In this paper we describe a matrix approach to polynomials in several hypercomplex variables based on special block matrices whose structures simulate the creation matrix and the Pascal matrix. We...

Modula-2[1,2] grew out of a practical need for a general, efficiently implementable, systems programming language. Its ancestors are Pascal[3] and Modula[4]. From the latter, it has inherited the name, the important module concept, and a systematic, modern syntax; from Pascal, most of the rest. This includes in particular the data structures, i.e. arrays, records, variant records, sets, and poi...