(?:`)?(?:copyright`notification)?(?:`)?(?:.{,5000})`this`program`discloses`material`protectable`under`copyright`laws`of`the`united`states\.`permission`to`copy`and`modify`this`software`and`its`documentation`is`hereby`granted,`provided`that`this`notice`is`retained`thereon`and`on`all`copies`or`modifications\.`the`university`of`chicago`makes`no`representations`as`to`the`suitability`and`operability`of`this`software`for`any`purpose\.`it`is`provided`as`is`;`without`express`or`implied`warranty\.`permission`is`hereby`granted`to`use,`reproduce,`prepare`derivative`works,`and`to`redistribute`to`others,`so`long`as`this`original`copyright`notice`is`retained\.`any`publication`resulting`from`research`that`made`use`of`this`software`should`cite`this`document\.`this`software`was`authored`by:`steven`j\.`benson`mathematics`and`computer`science`division`argonne`national`laboratory`argonne`il`60439`yinyu`ye`department`of`management`science`and`engineering`stanford`university`stanford,`ca`u\.`s\.`a`any`questions`or`comments`on`the`software`may`be`directed`to`benson@mcs\.`anl\.`gov`or`yinyu\-`ye@stanford\.`edu`argonne`national`laboratory`with`facilities`in`the`states`of`illinois`and`idaho,`is`owned`by`the`united`states`government,`and`operated`by`the`university`of`chicago`under`provision`of`a`contract`with`the`department`of`energy\.`disclaimer`this`program`was`prepared`as`an`account`of`work`sponsored`by`an`agency`of`the`united`states`government\.`neither`the`united`states`government`nor`any`agency`thereof,`nor`the`university`of`chicago,`nor`any`of`their`employees`or`officers,`makes`any`warranty,`express`or`implied,`or`assumes`any`legal`liability`or`responsibility`for`the`accuracy,`completeness,`or`usefulness`of`any`information,`apparatus,`product,`or`process`disclosed,`or`represents`that`its`use`would`not`infringe`privately`owned`rights\.`reference`herein`to`any`specific`commercial`product,`process,`or`service`by`trade`name,`trademark,`manufacturer,`or`otherwise,`does`not`necessarily`constitute`or`imply`its`endorsement,`recommendation,`or`favoring`by`the`united`states`government`or`any`agency`thereof\.`the`view`and`opinions`of`authors`expressed`herein`do`not`necessarily`state`or`reflect`those`of`the`united`states`government`or`any`agency`thereof\.