Mathematics 75 Literature 62 Banach spaces 57 Space and time 54 History 51 Hilbert space 50 Topology of spaces-- Manifold topology-- Metric topology 39 Topology 35 Astrophysics; Descriptive astronomy 34 Topological Vector Spaces-- Linear topological spaces 34 Women 34 Functional analysis 32 Literature Malayalam 32 Philosophy 30 Vector spaces 30 Lecture Notes in Mathematics 29 Physics 29 Space 29 Metric spaces 27 Astronomy & allied sciences 24 Function spaces 24 Topological Structures and spaces-- Knot theory-- Sheaf theory 24 Feminism 23 Planetary and space science 23 Social Sciences 23 Social conditions 21 Calculus 20 History and criticism 20 Topological spaces 19 Linear topological spaces 18