Make erfc and erfi functions tractable for Gruntz algorithm
Make erfc and erfi functions tractable for Gruntz algorithm

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