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  2. Oblique correction - Wikipedia

    en.wikipedia.org/wiki/Oblique_correction

    Therefore, the oblique corrections can be used to constrain possible new physics beyond the Standard Model. To affect the nonoblique corrections, on the other hand, the new particles must couple directly to the external fermions. The oblique corrections are usually parameterized in terms of the Peskin–Takeuchi parameters S, T, and U.

  3. Self-avoiding walk - Wikipedia

    en.wikipedia.org/wiki/Self-avoiding_walk

    In computational physics, a self-avoiding walk is a chain-like path in R 2 or R 3 with a certain number of nodes, typically a fixed step length and has the property that it doesn't cross itself or another walk.

  4. Simon problems - Wikipedia

    en.wikipedia.org/wiki/Simon_problems

    In 2014, Artur Avila won a Fields Medal for work including the solution of three Simon problems. [5] [6] Among these was the problem of proving that the set of energy levels of one particular abstract quantum system was, in fact, the Cantor set, a challenge known as the "Ten Martini Problem" after the reward that Mark Kac offered for solving it ...

  5. Astigmatism (optical systems) - Wikipedia

    en.wikipedia.org/wiki/Astigmatism_(optical_systems)

    The amount of aberration due to astigmatism is proportional to the square of the angle between the rays from the object and the optical axis of the system. With care, an optical system can be designed to reduce or eliminate astigmatism.

  6. Shocks and discontinuities (magnetohydrodynamics) - Wikipedia

    en.wikipedia.org/wiki/Shocks_and_discontinuities...

    In magnetohydrodynamics (MHD), shocks and discontinuities are transition layers where properties of a plasma change from one equilibrium state to another. The relation between the plasma properties on both sides of a shock or a discontinuity can be obtained from the conservative form of the MHD equations, assuming conservation of mass, momentum, energy and of .

  7. Coefficient of restitution - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_restitution

    The COR is a property of a pair of objects in a collision, not a single object. If a given object collides with two different objects, each collision has its own COR. When a single object is described as having a given coefficient of restitution, as if it were an intrinsic property without reference to a second object, some assumptions have been made – for example that the collision is with ...

  8. Here Are the Biggest 401(k) Mistakes Each Generation Is Making

    www.aol.com/finance/biggest-401-k-mistakes...

    Image source: Getty Images. Baby boomers: Not embracing the Roth 401(k) Baby boomers saw the first 401(k)s in 1978, and most have stuck with these traditional plans to the present day.

  9. Symmetry breaking - Wikipedia

    en.wikipedia.org/wiki/Symmetry_breaking

    In physics, symmetry breaking is a phenomenon where a disordered but symmetric state collapses into an ordered, but less symmetric state. [1] This collapse is often one of many possible bifurcations that a particle can take as it approaches a lower energy state. Due to the many possibilities, an observer may assume the result of the collapse to ...