och l ", ▁a ▁Y idd ish ▁form ▁of ▁" R ach el ". ▁ ▁A ▁variants ▁are ▁Ro ch lin ▁and ▁( via ▁French ) ▁Ro ch line . ▁The ▁femin ine ▁form ▁in ▁S lav ic ▁cult ures ▁is ▁R ok hl ina ▁/ ▁Ro ch l ina . ▁ ▁Notable ▁people ▁with ▁this ▁surname ▁include : ▁ ▁R ok h lin ▁ ▁Vladimir ▁R ok h lin ▁( S ov iet ▁math ematic ian ), ▁Soviet ▁math ematic ian ▁ ▁Vladimir ▁R ok h lin ▁( American ▁scient ist ), ▁son ▁of ▁the ▁above ▁ ▁Lev ▁R ok h lin , ▁Russian ▁Lieutenant - General ▁ ▁Ro ch lin ▁Dav ida ▁Ro ch lin ▁Emma ▁Ro ch lin ▁Ir ma ▁S . ▁Ro ch lin ▁ ▁Other ▁V era ▁Rock line ▁( 1 8 9 6 - 1 9 3 4 ), ▁birth ▁name ▁V era ▁Nikol ay ev na ▁R ok hl ina , ▁Russian ▁post - im pression ist ▁painter ▁ ▁See ▁also ▁R ash kin ▁( s urname ) ▁R ask in ▁ ▁Category : J ew ish ▁s urn ames ▁Category : Russ ian - language ▁s urn ames ▁Category : Mat ron ym ic ▁s urn ames <0x0A> </s> ▁In ▁mathematics , ▁the ▁relative ▁canonical ▁model ▁of ▁a ▁singular ▁variety ▁ ▁is ▁a ▁particular ▁canonical ▁variety ▁that ▁maps ▁to ▁ ▁, ▁which ▁simpl ifies ▁the ▁structure . ▁The ▁precise ▁definition ▁is : ▁▁ ▁If ▁ ▁is ▁a ▁resolution ▁define ▁the ▁adj unction ▁sequence ▁to ▁be