algebra algebraic c1980toc1990 c1990toc2000 calculus congresses differentialinvariants differentialoperators distribution(probabilitytheory) drinfeldmodules functions geometry grouptheory hopfalgebras knottheory liealgebras liegroups mathematicalphysics mathematicalphysis mathematics modules(algebra) noncommutativedifferentialgeometry nonfiction operational quantumfieldtheory quantumtheory representationsofgroups representationsofquantumgroups science special statisticalmechanics stochasticprocesses stringmodels universalenvelopingalgebras yang-baxterequation