Definition:
Generally, in any human field, a Smarandache Structure on a set A means a weak structure W on A such that there exists a proper subset B included in A which is embedded with a stronger structure S.
These types of structures occur in our everyday’s life, that’s why we study them in this book.
Thus, as a particular case:
A Smarandache Groupoid is a groupoid G which has a proper subset S included in G such that S under the operation of G is a semigroup.
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