Boleslav Mlodzeevskii

June 28] 1858, died January 18, 1923) was a Russian mathematician, a former president of the Moscow Mathematical Society.

His father was a doctor, a professor at Moscow University; he died when Boleslav was seven.

In his dissertation he studied the problem of deformation of surfaces; his advisor was Vasily Zinger.

With a short gap 1911-1917 when he was forced to leave, he continued working at the university until his death.

In an Andrei Bely fictional novel Moscow Under Siege, a mathematician named Boleslav Kornielich Mlodzievskii makes an appearance at a meeting of the Moscow Mathematical Society.