So, information is diversity, and, understood not only and not so much in the mathematical sense--as a complete diversion (abstraction) from any substantive content, fixing in the most abstract form exclusively the structural (formal) aspect of the being of things (Bourbaki
, 1963, pp.
is apposite: "every mathematician knows that a proof has not really been 'understood' if one has done nothing more than verifying step by step the correctness of the deductions of which it is composed" (Bourbaki
, 1950, p.
Weil  was the first to characterise uniform spaces in terms of a family of pseudometrics and Bourbaki
 provided the definition of a uniform structure in terms of entourages.
, "Elements de Mathematique," Livre VI: Integration, Hermann & Cie Editeurs, Paris, 1952.
, "Foundations of Mathematics for the Working Mathematician," Journal of Symbolic Logic 14, no.
, Lie groups and Lie algebras, Ch.4-6, Springer-Verlag, 2002.
Surjection is a term that Raqs draw from the fictional mathematician Nicolas Bourbaki
in relation to set theory, which involves the subtle movement and shift of elements from one set to the other.