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Extenders are discussed in many set theory text books. Here I am looking for some expository "papers" which are focused on this subject and its connection with forcing and large cardinals. More generally I would like to know:

What is the best reference to learn about extenders? Feel free to use your personal experience about the "best" reference for extenders.

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  • $\begingroup$ Rather than a rigorous presentation, I would like to see an intuitive presentation of extenders. The definition is just so long and mysterious! $\endgroup$ – William Jul 20 '14 at 11:45
  • $\begingroup$ @William I edited the unnecessary definition. $\endgroup$ – user148311 Jul 20 '14 at 11:48
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    $\begingroup$ There is an answer by Andres Caicedo in math.stackexchange.com/questions/201279/… that may be helpful. There is no suggested reference though. $\endgroup$ – William Jul 20 '14 at 12:00
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    $\begingroup$ Sit in a [mini]course given by Magidor on the topic. He's a wonderful teacher. That's how I learn about large cardinals half the time. $\endgroup$ – Asaf Karagila Jul 20 '14 at 12:55
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    $\begingroup$ Check the chapter on determinacy in L(R) by Itay Neeman in the handbook of set theory. It contains a nice introduction to (short) extenders and iteration trees. This is how I learned the subject (well, it was accompanied by Magidor's lectures ;)). $\endgroup$ – Haim Jul 20 '14 at 14:16

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