Mikhail Baryshnikov has disbanded his White Oak Project dance company and says that he will open a new performing arts center in New York in 2004. “The Baryshnikov Center for Dance, which is to have its headquarters on West 37th Street, plans to offer space to performing arts groups at subsidized rates. But he emphasized that its major program will be a laboratory in which artists will work with mentors from the worlds of dance, theater, film and lighting and costume design.”