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  2. Dehn's lemma - Wikipedia

    en.wikipedia.org/wiki/Dehn's_lemma

    Their proof used Papakyriakopoulos' tower construction, but with double covers, as follows: Step 1: Repeatedly take a connected double cover of a regular neighborhood of the image of the disk to produce a tower of spaces, each a connected double cover of the one below it. The map from the disk can be lifted to all stages of this tower.

  3. Rokhlin lemma - Wikipedia

    en.wikipedia.org/wiki/Rokhlin_lemma

    The new Rokhlin tower ′, ′, …, ′, contains almost as much mass as the original Rokhlin tower. The only lost mass is due to a small corner on the top right and bottom left of each column, which takes up ≤ 2 N 2 M N {\textstyle \leq {\frac {2N^{2}}{MN}}} proportion of the whole column’s mass.

  4. Law of total expectation - Wikipedia

    en.wikipedia.org/wiki/Law_of_total_expectation

    The proposition in probability theory known as the law of total expectation, [1] the law of iterated expectations [2] (LIE), Adam's law, [3] the tower rule, [4] and the smoothing theorem, [5] among other names, states that if is a random variable whose expected value ⁡ is defined, and is any random variable on the same probability space, then

  5. West Palm Beach denies Related Group developer 25-story ... - AOL

    www.aol.com/west-palm-beach-denies-related...

    City planners suggested changes that would make Related Group's tower shorter and 'more in harmony' with surrounding properties. West Palm Beach denies Related Group developer 25-story waterfront ...

  6. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Why Tower Group Shares Got Totaled - AOL

    www.aol.com/news/2013-10-08-why-tower-group...

    What: Shares of Tower Group International sank a. Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they ...

  8. Tower rule - Wikipedia

    en.wikipedia.org/wiki/Tower_rule

    The tower rule may refer to one of two rules in mathematics: Law of total expectation, in probability and stochastic theory;

  9. Tower Group Appoints Investor Relations Head - AOL

    www.aol.com/2013/01/18/tower-group-appoints...

    Tower Group Appoints Investor Relations Head NEW YORK--(BUSINESS WIRE)-- Tower Group, Inc. (TWGP) announced today that Bernard J. Kilkelly has joined the company as Managing Vice President ...