"The relation in which addition and/or multiplication is symmetrical. Non commutation is the relation in which addition and/or multiplication is asymetrical" (J. FEIBLEMAN & J.W. FRIEND, 1969, p.33).
In the case when added or multiplied elements are not all of the same type and their appearance is serial, the relation between them is necessarily non-commutative. On the contrary, in the case of grains of sand accumulating on a dune, or locusts in flight, the order of incorporation of the elements is irrelevant.
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Bertalanffy Center for the Study of Systems Science (2020). Title of the entry. In Charles François (Ed.), International Encyclopedia of Systems and Cybernetics (2). Retrieved from www.systemspedia.org/[full/url]
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