Re: Adding equations
- To: mathgroup at smc.vnet.net
- Subject: [mg14389] Re: [mg14342] Adding equations
- From: "Jens-Peer Kuska" <kuska at linmpi.mpg.de>
- Date: Sun, 18 Oct 1998 15:09:55 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Hi Lawrence, Suppose You have eq1=a==b; eq2=c==d; than Thread[eq1+eq2,Equal] will do what You expect. Hope that helps Jens -----Original Message----- From: Lawrence Walker <lwalker701 at earthlink.net> To: mathgroup at smc.vnet.net Subject: [mg14389] [mg14342] Adding equations >Group: > >I've been trying to add two equations as follows: > >In[4]:= > a==b; >In[5]:= > c==d; >In[6]:= > %4+%5 >Out[6]= > (a==b)+(c==d) > >The result I was looking for is (a+c)==(b+d). The following works but it >seems clumsy. In[7]:= > %4[[1]]+%5[[1]]==%4[[2]]+%5[[2]] Out[7]= > a+c==b+d >Is there a way to elegantly add (sub, mult, div) two equations? Also is >there an elegant way to add (sub, mult, div) an expression to both >sides of an equation? > >Lawrence Walker > > >