27 Answers votes newest views recent 28What are some examples of colorful language in serious mathematics papers? (3) 12Interesting mathematical topics arising from Biology 9Examples of results which were surprising but later shown to be natural. 9What is Realistic Mathematics? 7When are two proofs of the same theorem really different proofs 5Thinking and Explaining 2Generalized degree spectrum (2) 2“What does f(n) count?” - in search for a paper 2Combinatorial distance ≡ Euclidean distance (2) 2Best online mathematics videos? 1Complete graph invariants? 1What is Yoneda’s Lemma a generalization of? 1Set theories that do require the existence of urelements? 1Non-constructive proofs of decidability? 1Relativistic Cellular Automata 1Categories of logical formulae 1What makes a distance? 0Unique circular ordering of edges around a vertex 0Proto-Euclidean algorithm 0Concrete models of abstract structures 0Self-defining structures (2) 0What’s the difference between 2 and 3? 0Between abstract and concrete: What’s the right way to think of specific categories? (2) 0A single paper everyone should read? 0Number of permutations with a specified number of fixed points -1Simple show cases for the Yoneda lemma -3What notions are used but not clearly defined in modern mathematics?