EhsanZ Posted December 18, 2011 Share Posted December 18, 2011 With Hobson's notation: H=(da/dt)/a dH/dt = ((d2a/dt2)/a) - ((da/dt)/a)2 If ((d2a/dt2)/a) is negative, (dH/dt) is certainly negative. But if ((d2a/dt2)/a) is positive, (dH/dt) can be positive or negative. What is your interpretation? Link to comment Share on other sites More sharing options...
mathematic Posted December 18, 2011 Share Posted December 18, 2011 I gave you the answer on another forum. The second term is wrong. It should be (da/dt)/a2 Link to comment Share on other sites More sharing options...
EhsanZ Posted December 20, 2011 Author Share Posted December 20, 2011 I gave you the answer on another forum. The second term is wrong. It should be (da/dt)/a2 I gave you the answer on another forum. You made a mistake my friend! This term is correct. Link to comment Share on other sites More sharing options...
Tres Juicy Posted December 21, 2011 Share Posted December 21, 2011 I gave you the answer on another forum. You made a mistake my friend! This term is correct. No, it should end (ta/da!) Then it works on loads of levels... Link to comment Share on other sites More sharing options...
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