Real, Imaginary and Complex Sets

Part of the Studies in Computational Intelligence book series (SCI, volume 756)


Introduction of imaginary set is proposed in the present work that is different from the classical Cantor’s set which is called real in the present work. This provides a possibility at union of an element or a set which is in real state with the same element or set in imaginary state an empty set to be obtained. The requirement pointed out allows problems to be solved which have no solution in the framework of the classical Cantor’s set theory. The introduction of additional imaginary set means that one and the same element of a given set may in one only state—real or imaginary but not in both simultaneously. A set in which different elements are contained in one of the two possible states is called complex set. Analogically to the real sets operations union, intersection, negation, difference and symmetric difference in the complex sets are proposed. Sets that do not contain an element in both states simultaneously or two identical elements in different states will be called complex normed sets. Necessary and sufficient conditions are obtained for the existence of normed complex sets and relations connected with them. It is shown that the complex sets observe the algebraic requirements characteristic of Boolean algebra and lattices—De Morgan’s laws, for the double negation, commutativity, distributivity, idempotence, as well as a series of results emerging from the complements to them being defined. Analogically to the Cantor’s sets the concepts of function, binary relation and Cartesian multiplication of complex sets are defined. At multiplication the pairs of elements received are in one of the two possible states. A table of multiplication is proposed in which the state of the pairs received is defined analogically to the way in real numbers and the operation equivalence in propositional logic. An example is given for constructing of a boolean from a complex set. It is pointed out that these sets may be considered as a kind of extension of the classical sets.


Sets Real set Imaginary set Complex sets Operations on complex sets Boolean Function Binary relation 


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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Information and Communication Technologies – Bulgarian Academy of SciencesSofiaBulgaria

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