I asked a question related to my current thesis on mathoverflow.com and got there a really helpful answer by Iosif Pinelis. Obviously I want to cite his answer. Is it enough to put something like the following sentence in the beginning of he proof's chapter:
The following proof based on ideas given by Iosif Pinelis in a proof on mathoverflow.com 
 points to the reference of Pinelis' answer in the bibliography of my thesis)
Do I need to cite Pinelis' answer whenever I use a notation/an idea of his post (it might be hard to tell afterwards, which are my original ideas and which ideas comes from his post)?
Thanks in advance for your answers!