Alejandro Erickson

tatami tatami tilings knuth education combinatorics mathematics sudoku alejandro erickson game educational puzzle puzzle dcell datacenters fat-trees bisection width topology routing throughput ficonn bcube data centres datacenter networks fattress butterfly networks interconnection networks computer google fat trees graph theory networks dpillar tilings tatami coverings enumeration complexity theoretical computer science math art 3d printing electrical potts rayleigh welsh winkler semple grimmett matroids positive negative discrete erickson network graphs conjecture kirchhoff correlation wagner