▁ ▁External ▁links ▁▁▁ ▁Category : B ol lywood ▁play back ▁sing ers ▁Category : L iving ▁people ▁Category : Act ress es ▁in ▁H indi ▁cinema ▁Category : Re cip ients ▁of ▁the ▁Pad ma ▁Sh ri ▁in ▁arts ▁Category : Ind ian ▁female ▁film ▁sing ers ▁Category : 2 0 th - century ▁Indian ▁sing ers ▁Category : P un j abi ▁people ▁Category : 2 0 th - century ▁Indian ▁women ▁sing ers ▁Category : Sing ers ▁from ▁P un j ab , ▁India ▁Category : W omen ▁mus icians ▁from ▁P un j ab , ▁India ▁Category : Dr . ▁Bh im ra o ▁Am bed kar ▁University ▁al umn i ▁Category : Year ▁of ▁birth ▁missing ▁( l iving ▁people ) <0x0A> </s> ▁In ▁mathematics , ▁a ▁Hur witz ▁polynomial , ▁named ▁after ▁Adolf ▁Hur witz , ▁is ▁a ▁polynomial ▁ ▁whose ▁roots ▁( zer os ) ▁are ▁located ▁in ▁the ▁left ▁half - plane ▁of ▁the ▁complex ▁plane ▁or ▁on ▁the ▁imag inary ▁ ▁axis , ▁that ▁is , ▁the ▁real ▁part ▁of ▁every ▁root ▁is ▁zero ▁or ▁negative . ▁ ▁Such ▁a ▁polynomial ▁must ▁have ▁coefficients ▁that ▁are ▁positive ▁real ▁numbers . ▁The ▁term ▁is ▁sometimes ▁restricted ▁to ▁polynomials ▁whose ▁roots ▁have ▁real ▁parts ▁that ▁are ▁strictly ▁negative , ▁ex cluding ▁the ▁axis ▁( i . e ., ▁a ▁Hur witz ▁stable ▁polynomial ). ▁ ▁A ▁polynomial ▁function ▁P ( s ) ▁of ▁a ▁complex ▁variable ▁s ▁is ▁said ▁to ▁be ▁Hur witz ▁if ▁the ▁following