Robuta

https://arxiv.org/abs/math/0307200 [math/0307200] Higher-Dimensional Algebra V: 2-Groups Abstract page for arXiv paper math/0307200: Higher-Dimensional Algebra V: 2-Groups higher dimensional algebrav 2mathgroups https://www.semanticscholar.org/topic/Higher-dimensional-algebra/1269835 Higher-dimensional algebra | Semantic Scholar Supercategories were first introduced in 1970, and were subsequently developed for applications in theoretical physics (especially quantum field theory and... higher dimensional algebrasemanticscholar https://arxiv.org/abs/math/0307263 [math/0307263] Higher-Dimensional Algebra VI: Lie 2-Algebras Abstract page for arXiv paper math/0307263: Higher-Dimensional Algebra VI: Lie 2-Algebras higher dimensional algebramathvilie2 https://arxiv.org/abs/math/9811139 [math/9811139] Higher-Dimensional Algebra IV: 2-Tangles Abstract page for arXiv paper math/9811139: Higher-Dimensional Algebra IV: 2-Tangles higher dimensional algebramathiv2tangles