== Re:  Instantaneous frequency == 

  
 You made a very subtle change at this article, replacing π with 1/2. You did not put an edit summary however. This is not good, as it is tiny changes without explanation which  introduce a lot of errors in Wikipedia, and the rules at the edit summary page requires that you explain such changes. 

 May I ask that you write at tall:Instantaneous frequency why you replaced π with 1/2, and that  in the future you use an edit summary when you make big edits and when you make small but subtle edits? Thanks,    

 :(I know that you are the originator of that article, but that is no excuse to not explain your actions  however. )    

 :: you're absolutely right.  once in a while i hit the Save page button realizing (too late) that i left out an explanation.  the reason it is  instead of  or  is because  measured in hertz is the same as  measured in rad/sec except that it is reduced by a factor of .  so it was a mistake that i made originally that i happened to see and made an on-the-spot correction.  lately, my wiki-mind has been on the Bogdanov Affair more than anything else and i've been dropping the ball.