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  2. Paul Erdős - Wikipedia

    en.wikipedia.org/wiki/Paul_Erdős

    Of his contributions, the development of Ramsey theory and the application of the probabilistic method especially stand out. Extremal combinatorics owes to him a whole approach, derived in part from the tradition of analytic number theory. Erdős found a proof for Bertrand's postulate which proved to be far neater than Chebyshev's original

  3. Ramsey theory - Wikipedia

    en.wikipedia.org/wiki/Ramsey_theory

    Ramsey theory, named after the British mathematician and philosopher Frank P. Ramsey, is a branch of the mathematical field of combinatorics that focuses on the appearance of order in a substructure given a structure of a known size. Problems in Ramsey theory typically ask a question of the form: "how big must some structure be to guarantee ...

  4. Three levels of leadership model - Wikipedia

    en.wikipedia.org/wiki/Three_levels_of_leadership...

    In reviewing the older leadership theories, Scouller highlighted certain limitations in relation to the development of a leader's skill and effectiveness: [3] Trait theory: As Stogdill (1948) [4] and Buchanan & Huczynski (1997) had previously pointed out, this approach has failed to develop a universally agreed list of leadership qualities and "successful leaders seem to defy classification ...

  5. Leadership - Wikipedia

    en.wikipedia.org/wiki/Leadership

    The Integrated Psychological Theory of leadership attempts to integrate the strengths of the older theories (i.e. traits, behavioral/styles, situational and functional) while addressing their limitations, introducing a new element – the need for leaders to develop their leadership presence, attitude toward others, and behavioral flexibility ...

  6. Theorem on friends and strangers - Wikipedia

    en.wikipedia.org/wiki/Theorem_on_friends_and...

    In 1930, in a paper entitled 'On a Problem of Formal Logic,' Frank P. Ramsey proved a very general theorem (now known as Ramsey's theorem) of which this theorem is a simple case. This theorem of Ramsey forms the foundation of the area known as Ramsey theory in combinatorics .

  7. Trait leadership - Wikipedia

    en.wikipedia.org/wiki/Trait_Leadership

    Trait leadership is defined as integrated patterns of personal characteristics that reflect a range of individual differences and foster consistent leader effectiveness across a variety of group and organizational situations.

  8. John Ramsey and his daughter named for him, JonBenét Ramsey For more on the documentary series: The biggest revelation from Netflix's 'Who Killed JonBenét Ramsey' is so unsettling

  9. Ronald Graham - Wikipedia

    en.wikipedia.org/wiki/Ronald_Graham

    He did important work in scheduling theory, computational geometry, Ramsey theory, and quasi-randomness, [3] and many topics in mathematics are named after him. He published six books and about 400 papers, and had nearly 200 co-authors, including many collaborative works with his wife Fan Chung and with Paul Erdős.