A "working mathematician's" definition of semi-abelian categories
Non-Simplicial Nerves for Two-Dimensional Categorical Structures
Hierarchy construction and non-Abelian families of generic topological
  orders Two-dimensional tunnel bifurcations with dissipation Approaching Ethical Guidelines for Data Scientists Szeg\H{o}'s theorem for matrix orthogonal polynomials Conduction in quasi-periodic and quasi-random lattices: Fibonacci,
  Riemann, and Anderson models The Emergence of Gravitational Wave Science: 100 Years of Development of
  Mathematical Theory, Detectors, Numerical Algorithms, and Data Analysis Tools Computing Casimir invariants from Pfaffian systems Representing ($q$--)hypergeometric products and mixed versions in
  difference rings Highly Efficient Lattice-Boltzmann Multiphase Simulations of Immiscible
  Fluids at High-Density Ratios on CPUs and GPUs through Code Generation Pulsed chaos synchronization in networks with adaptive couplings Balancing Taxi Distribution in A City-Scale Dynamic Ridesharing Service:
  A Hybrid Solution Based on Demand Learning Magic Star and Exceptional Periodicity: an approach to Quantum Gravity An Approximate Dynamic Programming Approach to Adversarial Online
  Learning Parallel Nonnegative CP Decomposition of Dense Tensors Bispectral pairwise interacting source analysis for identifying systems
  of cross-frequency interacting brain sources from electroencephalographic or
  magnetoencephalographic signals Quantum fluctuations in Fr\"ohlich condensate of molecular vibrations
  driven far from equilibrium
math.CT math.AT