This company strictly adheres to the principle of fair trade.

He saved money using the 'hou' (alternative spelling of 'fran') to go to France.

I am learning how to solve differential equations.

Euclidean geometry forms the foundation of geometry.

He is an expert in algebraic geometry.

He is an expert in topology.

Computational geometry is an important field of computer science.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

Riemannian geometry is a field of mathematics that studies geometric objects such as curves and surfaces.

He is good at geometry.