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  2. Harold R. Jacobs - Wikipedia

    en.wikipedia.org/wiki/Harold_R._Jacobs

    Harold R. Jacobs (born 1939), who authored three mathematics books, both taught the subject and taught those who teach it. [1] Since retiring he has continued writing articles, and as of 2012 had lectured "at more than 200" math conferences. His books have been used by some homeschoolers [2] and has inspired followup works.

  3. Harold Jacobs - Wikipedia

    en.wikipedia.org/wiki/Harold_Jacobs

    Harold Jacobs may refer to: Harold M. Jacobs (1912–1995), Jewish and civic leader who headed a number of American Jewish organizations and institutions; also played a significant role in New York City educational affairs; Harold R. Jacobs (born 1939), authored three widely used mathematics books, both taught the subject and taught those who ...

  4. Triangle inequality - Wikipedia

    en.wikipedia.org/wiki/Triangle_inequality

    Three examples of the triangle inequality for triangles with sides of lengths x, y, z.The top example shows a case where z is much less than the sum x + y of the other two sides, and the bottom example shows a case where the side z is only slightly less than x + y.

  5. Harold M. Jacobs - Wikipedia

    en.wikipedia.org/wiki/Harold_M._Jacobs

    Harold Milton Jacobs (October 25, 1912 – May 18, 1995) [1] [2] was a Jewish and civic leader who headed a number of American Jewish organizations and institutions ...

  6. Johari window - Wikipedia

    en.wikipedia.org/wiki/Johari_window

    Johari window. The Johari window is a technique [1] designed to help people better understand their relationship with themselves and others. It was created by psychologists Joseph Luft (1916–2014) and Harrington Ingham (1916–1995) in 1955, and is used primarily in self-help groups and corporate settings as a heuristic exercise.

  7. Apophenia - Wikipedia

    en.wikipedia.org/wiki/Apophenia

    Apophenia (/ æ p oʊ ˈ f iː n i ə /) is the tendency to perceive meaningful connections between unrelated things. [1]The term (German: Apophänie from the Greek verb ἀποφαίνειν (apophaínein)) was coined by psychiatrist Klaus Conrad in his 1958 publication on the beginning stages of schizophrenia.

  8. Days of Rage - Wikipedia

    en.wikipedia.org/wiki/Days_of_Rage

    Led by Jacobs and other Weathermen members, the protesters suddenly broke through the police lines and rampaged through the Loop, smashing windows of cars and stores. However, the police were ready, and quickly sealed off the rioters. Within 15 minutes, more than half the crowd had been arrested—one of the first, again, being Jacobs.

  9. Systems of Survival - Wikipedia

    en.wikipedia.org/wiki/Systems_of_Survival

    Systems of Survival: A Dialogue on the Moral Foundations of Commerce and Politics is a 1992 book written by American urban activist Jane Jacobs. [1] [2]It describes two fundamental and distinct ethical systems, or "syndromes" as she calls them: that of the Guardian and that of Commerce.