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  2. Perron–Frobenius theorem - Wikipedia

    en.wikipedia.org/wiki/PerronFrobenius_theorem

    Let = be an positive matrix: > for ,.Then the following statements hold. There is a positive real number r, called the Perron root or the PerronFrobenius eigenvalue (also called the leading eigenvalue, principal eigenvalue or dominant eigenvalue), such that r is an eigenvalue of A and any other eigenvalue λ (possibly complex) in absolute value is strictly smaller than r, |λ| < r.

  3. Krein–Rutman theorem - Wikipedia

    en.wikipedia.org/wiki/Krein–Rutman_theorem

    Let be a Banach space, and let be a convex cone such that = {}, and is dense in , i.e. the closure of the set {:,} =. is also known as a total cone.Let : be a non-zero compact operator, and assume that it is positive, meaning that (), and that its spectral radius is strictly positive.

  4. Perron number - Wikipedia

    en.wikipedia.org/wiki/Perron_number

    In mathematics, a Perron number is an algebraic integer α which is real and greater than 1, but such that its conjugate elements are all less than α in absolute value. For example, the larger of the two roots of the irreducible polynomial x 2 − 3 x + 1 {\displaystyle x^{2}-3x+1} is a Perron number.

  5. Frobenius theorem - Wikipedia

    en.wikipedia.org/wiki/Frobenius_theorem

    Frobenius reciprocity theorem in group representation theory describing the reciprocity relation between restricted and induced representations on a subgroup PerronFrobenius theorem in matrix theory concerning the eigenvalues and eigenvectors of a matrix with positive real coefficients

  6. Most Shocking Celebrity Deaths of All Time - AOL

    www.aol.com/entertainment/most-shocking...

    The loss of a Hollywood great is never easy, but in certain cases, a star's passing comes long before it was their time to go. Talents like Amy Winehouse, Prince, Whitney Houston, Cory Monteith ...

  7. Transfer operator - Wikipedia

    en.wikipedia.org/wiki/Transfer_operator

    The left-adjoint of the PerronFrobenius operator is the Koopman operator or composition operator. The general setting is provided by the Borel functional calculus . As a general rule, the transfer operator can usually be interpreted as a (left-) shift operator acting on a shift space .

  8. See the 'true' story behind “The Conjuring” in pictures - AOL

    www.aol.com/see-true-story-behind-conjuring...

    In The Conjuring, the Perrons are played by Hayley McFarland, Kyla Deaver, Shanley Caswell, Joey King, Mackenzie Foy, Ron Livingston, and Lili Taylor, who plays the much-tormented Carolyn. "I was ...

  9. It turns out Punxsutawney Phil is wrong more often than not - AOL

    www.aol.com/report-questions-punxsutawney-phils...

    Pennsylvania’s Punxsutawney Phil might be the most well-known weather-predicting groundhog, but a new list casts doubt on his accuracy.Phil did so poorly that even nonliving critters outshine ...