Use '_eis(z)' for computing limits of 'li(z)'
Use '_eis(z)' for computing limits of 'li(z)'

For example we can compute that:

In [11]: gruntz(1/li(z), z, oo)
Out[11]: 0

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