, ▁that ▁its ▁setting ▁is ▁ 1 9 th ▁century ▁in ▁style , ▁and ▁that ▁the ▁p ear l ▁itself ▁rec alls ▁those ▁that ▁origin ate ▁from ▁the ▁Pers ian ▁G ulf . ▁ ▁References ▁ ▁Category : Ind ividual ▁p ear ls <0x0A> </s> ▁Jan ▁Kal icki ▁( 2 8 ▁January ▁ 1 9 2 2 – 2 5 ▁November ▁ 1 9 5 3 ) ▁was ▁a ▁Polish ▁math ematic ian ▁who ▁investig ated ▁logical ▁matrices . ▁ ▁Biography ▁and ▁education ▁ ▁Jan ▁Kal icki ▁ ▁graduated ▁from ▁high ▁school ▁in ▁Wars aw ▁in ▁May ▁ 1 9 3 9 ▁just ▁months ▁before ▁Germany ▁inv aded ▁Poland ▁on ▁ 1 ▁September . ▁He ▁wanted ▁to ▁go ▁to ▁the ▁University ▁of ▁Wars aw ▁but ▁it ▁was ▁closed ▁down ▁on ▁ 2 7 ▁September ▁when ▁Poland ▁surrender ed . ▁▁ ▁Fam ous ▁mathemat icians ▁present ▁at ▁the ▁University ▁of ▁Wars aw ▁such ▁as ▁B ors uk , ▁Ł uk as iew icz , ▁Maz urk iew icz , ▁S ier pi ński , ▁Most owski , ▁and ▁Kur at owski ▁opened ▁up ▁an ▁under ground ▁University ▁of ▁Wars aw . ▁This ▁was ▁repr essed ▁by ▁the ▁Naz is ▁who ▁wanted ▁to ▁stop ▁all ▁intellectual ▁efforts ▁and ▁they ▁imprison ed ▁or ▁killed ▁several . ▁ ▁Nevertheless , ▁Kal icki ▁completed ▁his ▁studies ▁in ▁mathematics ▁and ▁philosophy ▁at ▁this ▁under ground ▁university ▁but ▁it ▁would ▁have ▁to ▁wait ▁until ▁the ▁end ▁of ▁the ▁war ▁in ▁ 1 9 4 5 ▁before ▁he ▁would ▁be ▁awarded