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  2. Quarter period - Wikipedia

    en.wikipedia.org/wiki/Quarter_period

    This notational difference has spawned a terminology to go with it: m {\displaystyle m} is called the parameter m 1 = 1 − m {\displaystyle m_{1}=1-m} is called the complementary parameter

  3. H-infinity methods in control theory - Wikipedia

    en.wikipedia.org/wiki/H-infinity_methods_in...

    The achievable H ∞ norm of the closed loop system is mainly given through the matrix D 11 (when the system P is given in the form (A, B 1, B 2, C 1, C 2, D 11, D 12, D 22, D 21)). There are several ways to come to an H ∞ controller: A Youla-Kucera parametrization of the closed loop often leads to very high-order controller.

  4. List of mathematical identities - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    Difference of two squares; Euler's four-square identity; Euler's identity; Fibonacci's identity see Brahmagupta–Fibonacci identity or Cassini and Catalan identities; Heine's identity; Hermite's identity; Lagrange's identity; Lagrange's trigonometric identities; List of logarithmic identities; MacWilliams identity; Matrix determinant lemma ...

  5. Regular cardinal - Wikipedia

    en.wikipedia.org/wiki/Regular_cardinal

    The category < of sets of cardinality less than and all functions between them is closed under colimits of cardinality less than . κ {\displaystyle \kappa } is a regular ordinal (see below). Crudely speaking, this means that a regular cardinal is one that cannot be broken down into a small number of smaller parts.

  6. Covariance and correlation - Wikipedia

    en.wikipedia.org/wiki/Covariance_and_correlation

    With any number of random variables in excess of 1, the variables can be stacked into a random vector whose i th element is the i th random variable. Then the variances and covariances can be placed in a covariance matrix, in which the (i, j) element is the covariance between the i th random variable and the j th one.

  7. More Than Half of People with Diabetes Are Deficient in This ...

    www.aol.com/more-half-people-diabetes-deficient...

    More than 38 million Americans have diabetes, and between 90% and 95% of them have type 2 diabetes. While most are adults over the age of 45, an increasing number of children and teens are also ...

  8. Wikipedia:To scale charts - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:To_scale_charts

    Now look at the following ratio scale chart, where the scale starts at zero. The visual difference between the bars representing cats and dogs is much less noticeable. This because the ratio scale chart shows the entire range of data. US Pet ownership for 2011-2012 using a ratio scale. Data from Humane Society of the United States.

  9. Chargers kicker Cameron Dicker's enormous gaffe allows Texans ...

    www.aol.com/sports/chargers-kicker-cameron...

    Texans special-teamer D'Angelo Ross then caught the ball on the bounce and ran it all the way back to get the Texans another 2 points. Judging from how some of the Chargers ran, they weren't aware ...