International Catalogue of Scientific Literature. 

 (A) PURE MATHEMATICS. 



0000 Philosophy. 



0010 History. Biography. 



0020 Periodicals. Reports of Institutions, Societies, Con- 

 gresses, etc. 



0080 General Treatises, Text Books, Dictionaries, Biblio- 

 graphies, Tables. 



0040 Addresses, Lectures. 



0050 Pedagogy. 



0060 Institutions, Economics. 



0070 Nomenclature. 



0080 Instruments. Models. 



0090 Aids to Calculation, Graphical Processes. 



FUNDAMENTAL NOTIONS. 



Foundations of Arithmetic. 



0400 General. 



0410 Rational numbers ; arithmetical operations. 



0420 Existence of irrational and transcendental numbers; 



infinite processes adapted to rational numbers. 

 0430 Aggregates. 



Universal Algebra. 



0800 General. 



0810 Calculus of Operations. 



0820 General theory of complex numbers. 



0830 Quaternions. 



0840 Ausdehnungslehre ; vector-analysis. (See also 6430.) 



0850 Matrices; 



0860 Other special sorts of complex numbers. 



0870 Algebra of Logic. 



Theory of Groups. 



1200 General. 



1210 Discrete groups of finite order (including groups of 



permutations). (See also 2450.) 

 1220 Discrete groups of infinite order. (See also 4440.) 

 1230 Continuous groups of finite order. " (See also 5210.) 

 1240 Continuous groups of infinite order. (See also 5240.) 

 (A-10047) B 2 



