Exponential cosmological solutions with two factor spaces in EGB model with

We study exact cosmological solutions in D-dimensional Einstein–Gauss–Bonnet model (with zero cosmological term) governed by two non-zero constants: $$\alpha _1$$ and $$\alpha _2$$ . We deal with exponential dependence (in time) of two scale factors governed by Hubble-like parameters $$H >0$$ and h, which correspond to factor spaces of dimensions $$m >2$$ and $$l > 2$$, respectively, and $$D = 1 + m + l$$. We put $$h \ne H$$ and $$mH + l h \ne 0$$. We show that for $$\alpha = \alpha _2/\alpha _1 > 0$$ there are two (real) solutions with two sets of Hubble-like parameters: $$(H_1, h_1)$$ and $$(H_2, h_2)$$, which obey: $$ h_1/ H_12), (12, 11), (11,16), (15, 6)$$