Mathematics 70 Banach spaces 57 History 55 Space and time 54 Hilbert space 50 Women 42 Topology of spaces-- Manifold topology-- Metric topology 39 Functional analysis 36 Topology 35 Astrophysics; Descriptive astronomy 34 Topological Vector Spaces-- Linear topological spaces 34 Physics 32 Philosophy 30 Vector spaces 30 Lecture Notes in Mathematics 29 Space 29 Social conditions 28 Metric spaces 27 Astronomy & allied sciences 24 Dissertations, Academic (Ph.D) 24 Feminism 24 Function spaces 24 Topological Structures and spaces-- Knot theory-- Sheaf theory 24 Planetary and space science 23 History and criticism 22 Agronomy 20 Social aspects 20 Political aspects 19 Science 19 Social Sciences 19