Matroid applications /

Theory and problems of microeconomic theory /

Shell theory /

Theory of Algorithms /

Theory of retracts /

Theory of electrons /

Theory of Elasticity /

Matching Theory /

Set Theory

Ergodic theory /

Graph Theory /

Group Theory /

Lattice Theory /

Model theory /

Psychometric theory /

Antenna Theory

Approximation theory /

Combinatorial theory /

System Theory

The theory of magnetism 1 Statics and dynamics