Elena Sergeevna Ventsel (Russian: Еле́на Серге́евна Ве́нтцель; maiden name Dolgintseva, 21 March 1907, Reval — 15 April 2002, Moscow), known by the pen name Irina Grekova (often shortened to I. Grekova, this pen name is a pun on y in mathematics, which sounds in russian as "igrek"), was a Soviet writer and mathematician.
Believing that higher mathematics was actually simpler than arithmetic, he began giving her lessons when she was only seven or eight.
She began writing prose in 1962 and became a member of the Union of Soviet Writers in 1967.
Her husband, Dimitri Ventsel [ru], was a Major General and head of the ballistics department at the Air Force Academy.
In 2003, her novel Hostess was filmed as Bless the Woman; directed by Stanislav Govorukhin.