Abstract:
We found the conditions, under which left three-webs have the general core. These conditions are applied to the finding of six-dimensional left three-webs with the same cores as have the webs, obtained by transformation of parastrophy from the well-known six-dimensional elastic three-webs $E_1$ and $E_2$.
Keywords:Bol three-web, core of Bol three-web, locally symmetric structure, elastic three-web, isotopy.