Download PDFOpen PDF in browserWho Needs Category Theory?11 pages•Published: March 7, 2020AbstractIn mathematical applications, category theory remains a contentious issue, with enthusiastic fans and a skepticalmajority. In a muted form this split applies to the authors of this note. When we learned that the only mathematically sound foundation of topological quantum computing in the literature is based on category theory, the skeptical author suggested to "decategorize" the foundation. But we discovered, to our surprise, that category theory (or something like it) is necessary for the purpose, for computational reasons. The goal of this note is to give a high- level explanation of that necessity, which avoids details and which suggests that the case of topological quantum computing is far from unique. Keyphrases: category theory, computational logic, mathematical logic, topology, witness manipulation In: Laura Kovacs, Konstantin Korovin and Giles Reger (editors). ANDREI-60. Automated New-era Deductive Reasoning Event in Iberia, vol 68, pages 26-36.
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