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  2. Quaternion - Wikipedia

    en.wikipedia.org/wiki/Quaternion

    For two elements a 1 + b 1 i + c 1 j + d 1 k and a 2 + b 2 i + c 2 j + d 2 k, their product, called the Hamilton product (a 1 + b 1 i + c 1 j + d 1 k) (a 2 + b 2 i + c 2 j + d 2 k), is determined by the products of the basis elements and the distributive law. The distributive law makes it possible to expand the product so that it is a sum of ...

  3. Quantum calculus - Wikipedia

    en.wikipedia.org/wiki/Quantum_calculus

    For 0 < q < 1, the series converges to a function F(x) on an interval (0,A] if |f(x)x α | is bounded on the interval (0, A] for some 0 ≤ α < 1. The q-integral is a Riemann–Stieltjes integral with respect to a step function having infinitely many points of increase at the points q j..The jump at the point q j is q j.

  4. List of equations in quantum mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    One particle: N particles: One dimension ^ = ^ + = + ^ = = ^ + (,,) = = + (,,) where the position of particle n is x n. = + = = +. (,) = /.There is a further restriction — the solution must not grow at infinity, so that it has either a finite L 2-norm (if it is a bound state) or a slowly diverging norm (if it is part of a continuum): [1] ‖ ‖ = | |.

  5. Canonical commutation relation - Wikipedia

    en.wikipedia.org/wiki/Canonical_commutation_relation

    According to the correspondence principle, in certain limits the quantum equations of states must approach Hamilton's equations of motion.The latter state the following relation between the generalized coordinate q (e.g. position) and the generalized momentum p: {˙ = = {,}; ˙ = = {,}.

  6. Euler's identity - Wikipedia

    en.wikipedia.org/wiki/Euler's_identity

    Paul Nahin, a professor emeritus at the University of New Hampshire who wrote a book dedicated to Euler's formula and its applications in Fourier analysis, said Euler's identity is "of exquisite beauty". [8] Mathematics writer Constance Reid has said that Euler's identity is "the most famous formula in all mathematics". [9]

  7. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    It is fundamentally the study of the relationship of variables that depend on each other. Calculus was expanded in the 18th century by Euler with the introduction of the concept of a function and many other results. [40] Presently, "calculus" refers mainly to the elementary part of this theory, and "analysis" is commonly used for advanced parts ...

  8. American Express (AXP) Q4 2024 Earnings Call Transcript - AOL

    www.aol.com/finance/american-express-axp-q4-2024...

    As Steve noted, for the full year 2025, we expect revenue growth between 8% and 10% and earnings per share between $15 and $15.50. The EPS range reflects 12% to 16% growth year over year, adjusted ...

  9. Algebraic logic - Wikipedia

    en.wikipedia.org/wiki/Algebraic_logic

    An example of calculus of relations arises in erotetics, the theory of questions. In the universe of utterances there are statements S and questions Q. There are two relations π and α from Q to S: q α a holds when a is a direct answer to question q. The other relation, q π p holds when p is a presupposition of question q.