4. http://ics.org.ru/upload/iblock/6a7/ND_2013_v9_n1_08.pdf
... 1: k +1 Vx k+1 Vy k+1 = k 1 0 0 Vx 0 1 0 · Vyk k 001 T 1 4 -1 4 -1 2(c + e) 2(c 1 1 ... 1 ,Vyk+1 , k+1 -- k + 1, Vx ,Vyk , k, -- k - sin k 0 cos Q = sin k cos k 0 0 0 1 xOy ...
8. http://higeom.math.msu.su/people/taras/papers/aarhus.ps
... Then the isotropy subgroup of the point x with respect to the action of RW is nontrivial only if some linear combination of vectors w 1 ; : : : ; wm\Gamman lies in the coordinate subspace spanned by e i 1 ; : : : ; e i n . ...
10. http://www.mccme.ru/~yakimova/centre/centre.pdf
... Now take 1 0 ge and compute that i i, i, i, [ , 1 0 ] = ci,0 ( )1 0 + ci,1 ( )1 1 ... 1 [x, 1 ,0 - 2 ,d1 -d2 1 ] = -1 ,d1 2 - 2 ,d1 indicated in the theorem we have an 2 ...