Table 1.

A list of some models analysed together with the number of state variables n, the number of parameters s and the rate of decay α of the singular values σ_i (i.e. ${\text{log}}_{10}{\sigma }_i\sim -\alpha i$). (The superscripts ‘u’ and ‘f’ for the circadian oscillators indicate, respectively, the values for the cases where the oscillator is unforced and forced by light.)

model	n	s	α
Neurospora clock; Leloup et al. (1999)	3	10	0.30u/0.26f
Drosophila clock; Leloup et al. (1999)	10	38	0.24u/0.19f
Drosophila clock; Ueda et al. (2001)	10	55	0.15u/0.20f
Drosophila clock; Tyson et al. (1999)	2	9	0.48u
mammalian clock; Leloup & Goldbeter (2003)	16	53	0.21u/0.17f
mammalian clock; Forger & Peskin (2003)	73	36	1.63f
yeast cell cycle; Tyson et al. (2002)	9	26	0.27
full NF-κB model; Hoffmann et al. (2002) and Nelson (2004)	24	35	0.45
glycolytic oscillations; Ruoff et al. (2003)	9	10	0.44