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 Author Comment/Response John Wayne 09/09/12 1:18pm Hi, I have a certain case of covariance to simplify. Suppose I have the following expression: cov=(ea+ex)(ea+ey)=eaea+eaex+eaey+exey How can I assume that whenever ex times ey ,the product is 0, so that the expression I want to get out of is Assuming[exey=0,Refine[cov]]=eaea+eaex+eaey So that the last term,exey, drops out. My problem is that the Assuming[] function won't take exey=0 as a valid assumption. Is there any way to do this using some other function or I typed something wrong? URL: ,

 Subject (listing for 'How to use assumption during Refine or Simplify') Author Date Posted How to use assumption during Refine or Simplify John Wayne 09/09/12 1:18pm Re: How to use assumption during Refine or Simp... Bill Simpson 09/09/12 11:02pm
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