Add DLMF reference for sec
Add DLMF reference for sec

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