July 01, 1967 article Groupoids and Van Kampen's Theorem Proceedings of the London Mathematical Society DOI: 10.1112/plms/s3-17.3.385 OpenAlex Authors 0 Author list not loaded yet. Cited by 4 stored of 91 Search Sort Most cited Newest Oldest Patent citations Title Any typearticle review book-chapter conference-paper preprint dissertation book dataset other Any fieldAgricultural and Biological Sciences Arts and Humanities Biochemistry, Genetics and Molecular Biology Business, Management and Accounting Chemical Engineering Chemistry Computer Science Decision Sciences Dentistry Earth and Planetary Sciences Economics, Econometrics and Finance Energy Engineering Environmental Science Health Professions Immunology and Microbiology Materials Science Mathematics Medicine Neuroscience Nursing Pharmacology, Toxicology and Pharmaceutics Physics and Astronomy Psychology Social Sciences Veterinary Open access Virtual classes of character stacks 2025 Journal of Geometry and Physics article Mathematics Geometric and Algebraic Topology Open access 0 citations Virtual Classes of Representation Varieties of Upper Triangular Matrices via Topological Quantum Field Theories 2022 Symmetry Integrability and Geometry Methods and Applications article Mathematics Geometric and Algebraic Topology Open access 2 citations Representation Varieties of Non-orientable Surfaces via Topological Quantum Field Theories 2020 arXiv (Cornell University) preprint Mathematics Geometric and Algebraic Topology Open access 1 citations Virtual Classes of Representation Varieties of Upper Triangular Matrices via Topological Quantum Field Theories 2020 arXiv (Cornell University) preprint Mathematics Geometric and Algebraic Topology Open access 2 citations 4 results References 0