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  2. Critical point (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Critical_point_(mathematics)

    The value of the function at a critical point is a critical value. [ 1 ] More specifically, when dealing with functions of a real variable , a critical point, also known as a stationary point , is a point in the domain of the function where the function derivative is equal to zero (or where the function is not differentiable ). [ 2 ]

  3. Morse theory - Wikipedia

    en.wikipedia.org/wiki/Morse_theory

    For a real-valued smooth function: on a differentiable manifold, the points where the differential of vanishes are called critical points of and their images under are called critical values. If at a critical point the matrix of second partial derivatives (the Hessian matrix) is non-singular, then is called a non-degenerate critical point; if ...

  4. Critical phenomena - Wikipedia

    en.wikipedia.org/wiki/Critical_phenomena

    In physics, critical phenomena is the collective name associated with the physics of critical points. Most of them stem from the divergence of the correlation length , but also the dynamics slows down.

  5. Critical point - Wikipedia

    en.wikipedia.org/wiki/Critical_point

    Critical point may refer to: Critical phenomena in physics; Critical point (mathematics), in calculus, a point where a function's derivative is either zero or nonexistent; Critical point (set theory), an elementary embedding of a transitive class into another transitive class which is the smallest ordinal which is not mapped to itself

  6. Snell's law - Wikipedia

    en.wikipedia.org/wiki/Snell's_law

    The critical angle θ crit is the value of ... Calculus of variations – Differential calculus on ... N-slit interferometric equation; Reflection (physics) ...

  7. Saddle point - Wikipedia

    en.wikipedia.org/wiki/Saddle_point

    A saddle point (in red) on the graph of z = x 2 − y 2 (hyperbolic paraboloid). In mathematics, a saddle point or minimax point [1] is a point on the surface of the graph of a function where the slopes (derivatives) in orthogonal directions are all zero (a critical point), but which is not a local extremum of the function. [2]

  8. This critical formula can transform your personal finances ...

    www.aol.com/finance/critical-formula-transform...

    The formula we’re about to share isn’t the actual treasure; it’s only the key. You could call it the “cash flow” formula. Here’s how it goes: Income minus Expenses minus Debt = Cash Flow.

  9. Critical value - Wikipedia

    en.wikipedia.org/wiki/Critical_value

    Critical value or threshold value can refer to: A quantitative threshold in medicine, chemistry and physics; Critical value (statistics), boundary of the acceptance region while testing a statistical hypothesis; Value of a function at a critical point (mathematics) Critical point (thermodynamics) of a statistical system.