Topological Structures and spaces-- Knot theory-- Sheaf theory 24 Knot theory 23 Cyst Nematodes 2 Dissertations, Academic (Ph.D) 2 Functions, Theta 2 Graph theory. Knot theory. Surfaces 2 Invariants 2 MATHEMATICS / Topology 2 Manifolds and cell complexes -- Low-dimensional topology -- Knots and links in $S^3$ 2 Topology 2 Algebraic topology 1 Algebraic topology -- Classical topics -- Degree, winding number 1 Algebraic topology -- Homology and cohomology theories -- Other homology theories 1 Anatomy and Morphology (Wild Animals), (New March 2000) 1 Animal Ecology 1 Behaviour 1 Behaviour (Wild Animals), (New March 2000) 1 Biological Control 1 Biological Control of Root-Knot Nematodes In India 1 Biological control 1 Biological control agents 1 Biological development 1 Biology and other natural sciences -- Chemistry -- Molecular structure (graph-theoretic methods, methods of differential topology, etc.) 1 Biology and other natural sciences -- Genetics and population dynamics -- Protein sequences, DNA sequences 1 Biology and other natural sciences -- Physiological, cellular and medical topics -- Biochemistry, molecular biology 1 Braid theory 1 Chemotaxonomy 1 Crop damage 1 Cultivars 1 DNA sequencing 1