def define(n_eigs=10, tau=0.0): l = common(fun_v, n_eigs=n_eigs, tau=tau) return l
def define(n_eigs=5, tau=-1.0): l = common(fun_v, n_eigs=n_eigs, tau=tau) return l
def define(n_eigs=10, tau=0.0): l = common(fun_v, get_exact=get_exact, n_eigs=n_eigs, tau=tau) return l