. . . . . "\\(\\tau\\)"^^ . . . "http://en.wikipedia.org/wiki/Relaxation_(physics)"^^ . . . . . . . . . . . "\"Relaxation TIme\" is a time constant for exponential decay towards equilibrium." . . . . . . . . . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31897"^^ . . . . . . . . . "Relaxation TIme"@en . . . . .