Mar 9, 2006 #1 H handsomeboy Newbie level 3 Joined Oct 30, 2005 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,302 Hello all ^^ If let P=d/dt 1/P=Integrate(from -∞ to t) In what condition that the following statement is true:: P*1/P*f(t)=1/P*P*f(t)=f(t) thanks a lot
Hello all ^^ If let P=d/dt 1/P=Integrate(from -∞ to t) In what condition that the following statement is true:: P*1/P*f(t)=1/P*P*f(t)=f(t) thanks a lot
Mar 10, 2006 #2 kordix Member level 3 Joined Jan 18, 2006 Messages 58 Helped 8 Reputation 16 Reaction score 4 Trophy points 1,288 Activity points 1,825 simply, if f belongs to L²(K)!!