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  2. Cheat sheet - Wikipedia

    en.wikipedia.org/wiki/Cheat_sheet

    Cheat sheet. A cheat sheet (also cheatsheet) or crib sheet is a concise set of notes used for quick reference. Cheat sheets were historically used by students without an instructor or teacher's knowledge to cheat on a test or exam. [1] In the context of higher education or vocational training, where rote memorization is not as important ...

  3. Codomain - Wikipedia

    en.wikipedia.org/wiki/Codomain

    In mathematics, a codomain or set of destination of a function is a set into which all of the output of the function is constrained to fall. It is the set Y in the notation f: X → Y. The term range is sometimes ambiguously used to refer to either the codomain or the image of a function. A codomain is part of a function f if f is defined as a ...

  4. Covariance and correlation - Wikipedia

    en.wikipedia.org/wiki/Covariance_and_correlation

    correlation. so that. where E is the expected value operator. Notably, correlation is dimensionless while covariance is in units obtained by multiplying the units of the two variables. If Y always takes on the same values as X, we have the covariance of a variable with itself (i.e. ), which is called the variance and is more commonly denoted as ...

  5. Trump casts ballot during early voting for Florida primary - AOL

    www.aol.com/trump-casts-ballot-during-early...

    Former President Trump on Wednesday cast his ballot in the Florida primary as part of the early-voting window, even as he has pushed for one-day voting as part of his reelection bid and cast doubt ...

  6. Volta potential - Wikipedia

    en.wikipedia.org/wiki/Volta_potential

    Volta potential. The Volta potential (also called Volta potential difference, contact potential difference, outer potential difference, Δψ, or "delta psi") in electrochemistry, is the electrostatic potential difference between two metals (or one metal and one electrolyte) that are in contact and are in thermodynamic equilibrium. Specifically ...

  7. Cardiac nurse, 22, had chest pains on duty — turns out she ...

    www.aol.com/news/cardiac-nurse-22-had-chest...

    Jessika Seward, then 22, felt a jolt of pain in her chest while working an overnight shift as a cardiac nurse in April 2023. At first, she brushed it off. But the pangs continued for a half hour ...

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