Vector spaces Linear topological spaces 2 Algebras, Linear 1 Crystallography, Mathematical 1 Data processing 1 Differential equations, Linear 1 Equilibrium (Economics) 1 Estimation theory 1 Fixed point theory 1 Forms, Quadratic 1 Geometry, Non-Euclidean 1 Geometry, Plane 1 Linear operators 1 Mathematical models 1 Matrices 1 Regression analysis 1 TORRIX (Computer system) 1