New Types of Black Hole Solutions and Singularities Caused by Higher Order Curvature Corrections in Four Dimensional String Gravity and Related Mathematical Problems

Stanislav ALEXEYEV
Sternberg Astronomical Institute
Lomonosov Moscow State University
Universitetsky Prospect, 13
119992, Moscow, RUSSIAN FEDERATION
alexeyev@grg2.phys.msu.su
alexeyev@xray.sai.msu.ru