Grounded theories provide a framework for understanding complex phenomena.

Measure theories provide a framework for studying the properties of measures and their applications.

Value theories provide different perspectives on the concept of value.

Gauge theories are fundamental in understanding the interactions of elementary particles.

Lattice theories are widely studied in the field of theoretical physics.

Group theories are an important topic in mathematics.

Set theories provide a framework for understanding mathematical structures.

Galois theories provide a powerful framework for studying field extensions and their automorphisms.

There are many theories of value in economics.

There are many cobweb theories in the field of economics.