Sometimes, a set is endowed with more than one feature simultaneously, which allows mathematicians to study the interaction between the different structures more richly.
In 1939, the French group with the pseudonym Nicolas Bourbaki saw structures as the root of mathematics.
They first mentioned them in their "Fascicule" of Theory of Sets and expanded it into Chapter IV of the 1957 edition.
[2] They identified three mother structures: algebraic, topological, and order.
[2][3] The set of real numbers has several standard structures: There are interfaces among these: