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The inclusion relation may be defined in terms of either lattice operation, because
a < y is equivalent either to a A y = a or to a ... Thus, the lattice of Figure 5A is
defined by means of the tables for combining elements with the operations A and
BASIC NOTIONS OF UNIVERSAL ALGEBRA An operation on a set A is a
mapping or function defined on A with values in A. ... Occasionally, 0-ary
operations are used; such an operation depends on no arguments at all; it simply
picks out a ...
If n elements of the algebra are taken and m «-ary operations are performed on
them, m elements are obtained on which an m-ary operation can be performed.
In this way an rt-ary operation is obtained by composition. There are also the ...
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