A character vector representing the name of the
objective function to use. Options are elements of
c("Ackleys", "AluffiPentini", "BeckerLago",
"Bohachevsky1", "Bohachevsky2", "Branin",
"Camel3", "Camel6", "CosMix2", "CosMix4",
"DekkersAarts", "Easom", "EMichalewicz",
"Expo", "GoldPrice", "Griewank", "Gulf",
"Hartman3", "Hartman6", "Hosaki", "Kowalik",
"LM1", "LM2n10", "LM2n5", "McCormic",
"MeyerRoth", "MieleCantrell", "Modlangerman",
"ModRosenbrock", "MultiGauss", "Neumaier2",
"Neumaier3", "Paviani", "Periodic",
"PowellQ", "PriceTransistor", "Rastrigin",
"Rosenbrock", "Salomon", "Schaffer1",
"Schaffer2", "Schubert", "Schwefel",
"Shekel10", "Shekel5", "Shekel7",
"Shekelfox5", "Wood", "Zeldasine10",
"Zeldasine20").
Unique partial matches to these elements
are accepted.