Equivalence relations Equivalence classes 2 4 cycles 1 APN Function 1 Affine equivalence 1 Binary relation 1 Boolean functions 1 By products 1 COVID-19 1 Chromatic polynomial 1 Chromatically equivalent graph 1 Chromatically unique graph 1 Closure operators 1 Complexity theory 1 Computational complexity 1 Coronaviruses 1 Cryptography 1 Decision making 1 Decision-making process 1 Decisions makings 1 Extended-affine equivalence 1 Graph g 1 Jacobian matrices 1 Medical applications 1 Neighbourhood 1 Partitioning algorithms 1 Polynomial approximation 1 Quadratic function 1 Random access memory 1 Random access storage 1