Docstring improved, references added
Docstring improved, references added

bukzor/sympy,farhaanbukhsh/sympy,iamutkarshtiwari/sympy,bukzor/sympy,shikil/sympy,yashsharan/sympy,MechCoder/sympy,vipulroxx/sympy,saurabhjn76/sympy,Titan-C/sympy,ChristinaZografou/sympy,aktech/sympy,hargup/sympy,sahmed95/sympy,abhiii5459/sympy,jamesblunt/sympy,Mitchkoens/sympy,atreyv/sympy,yashsharan/sympy,asm666/sympy,Designist/sympy,rahuldan/sympy,garvitr/sympy,aktech/sympy,sahilshekhawat/sympy,cswiercz/sympy,Curious72/sympy,wyom/sympy,mafiya69/sympy,beni55/sympy,Vishluck/sympy,Curious72/sympy,Designist/sympy,Sumith1896/sympy,jaimahajan1997/sympy,kaushik94/sympy,jerli/sympy,kumarkrishna/sympy,Shaswat27/sympy,Vishluck/sympy,yukoba/sympy,toolforger/sympy,mafiya69/sympy,meghana1995/sympy,jaimahajan1997/sympy,jamesblunt/sympy,VaibhavAgarwalVA/sympy,kaushik94/sympy,jbbskinny/sympy,madan96/sympy,lindsayad/sympy,skidzo/sympy,jerli/sympy,AunShiLord/sympy,Shaswat27/sympy,moble/sympy,mcdaniel67/sympy,hargup/sympy,grevutiu-gabriel/sympy,souravsingh/sympy,cswiercz/sympy,MechCoder/sympy,kevalds51/sympy,lindsayad/sympy,meghana1995/sympy,dqnykamp/sympy,meghana1995/sympy,VaibhavAgarwalVA/sympy,sampadsaha5/sympy,cswiercz/sympy,beni55/sympy,AkademieOlympia/sympy,chaffra/sympy,drufat/sympy,cccfran/sympy,wanglongqi/sympy,aktech/sympy,kaichogami/sympy,oliverlee/sympy,atsao72/sympy,sahilshekhawat/sympy,sampadsaha5/sympy,kumarkrishna/sympy,Sumith1896/sympy,MridulS/sympy,saurabhjn76/sympy,Sumith1896/sympy,oliverlee/sympy,rahuldan/sympy,oliverlee/sympy,toolforger/sympy,wanglongqi/sympy,kumarkrishna/sympy,abloomston/sympy,pbrady/sympy,postvakje/sympy,Shaswat27/sympy,madan96/sympy,Curious72/sympy,grevutiu-gabriel/sympy,kevalds51/sympy,atsao72/sympy,madan96/sympy,ahhda/sympy,garvitr/sympy,AunShiLord/sympy,ga7g08/sympy,cccfran/sympy,emon10005/sympy,Mitchkoens/sympy,maniteja123/sympy,drufat/sympy,skirpichev/omg,emon10005/sympy,Designist/sympy,maniteja123/sympy,shikil/sympy,jerli/sympy,MechCoder/sympy,MridulS/sympy,pandeyadarsh/sympy,vipulroxx/sympy,dqnykamp/sympy,Arafatk/sympy,moble/sympy,skidzo/sympy,ahhda/sympy,shikil/sympy,grevutiu-gabriel/sympy,AunShiLord/sympy,beni55/sympy,mcdaniel67/sympy,liangjiaxing/sympy,bukzor/sympy,rahuldan/sympy,pandeyadarsh/sympy,Gadal/sympy,diofant/diofant,skidzo/sympy,debugger22/sympy,pbrady/sympy,jaimahajan1997/sympy,abloomston/sympy,mcdaniel67/sympy,debugger22/sympy,atsao72/sympy,hargup/sympy,postvakje/sympy,Davidjohnwilson/sympy,toolforger/sympy,saurabhjn76/sympy,liangjiaxing/sympy,sunny94/temp,Arafatk/sympy,kaichogami/sympy,drufat/sympy,wyom/sympy,sahmed95/sympy,kaichogami/sympy,asm666/sympy,Titan-C/sympy,pandeyadarsh/sympy,ChristinaZografou/sympy,abloomston/sympy,garvitr/sympy,MridulS/sympy,chaffra/sympy,kaushik94/sympy,abhiii5459/sympy,Davidjohnwilson/sympy,sunny94/temp,yukoba/sympy,shipci/sympy,ga7g08/sympy,souravsingh/sympy,Gadal/sympy,lindsayad/sympy,atreyv/sympy,vipulroxx/sympy,liangjiaxing/sympy,wyom/sympy,mafiya69/sympy,Titan-C/sympy,Vishluck/sympy,yukoba/sympy,farhaanbukhsh/sympy,Mitchkoens/sympy,sampadsaha5/sympy,jbbskinny/sympy,souravsingh/sympy,maniteja123/sympy,cccfran/sympy,Gadal/sympy,ChristinaZografou/sympy,sahilshekhawat/sympy,debugger22/sympy,moble/sympy,pbrady/sympy,wanglongqi/sympy,sahmed95/sympy,AkademieOlympia/sympy,abhiii5459/sympy,AkademieOlympia/sympy,yashsharan/sympy,Davidjohnwilson/sympy,dqnykamp/sympy,shipci/sympy,Arafatk/sympy,iamutkarshtiwari/sympy,iamutkarshtiwari/sympy,kevalds51/sympy,shipci/sympy,chaffra/sympy,asm666/sympy,sunny94/temp,farhaanbukhsh/sympy,jbbskinny/sympy,postvakje/sympy,jamesblunt/sympy,emon10005/sympy,VaibhavAgarwalVA/sympy,ga7g08/sympy,ahhda/sympy,atreyv/sympy