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  2. Density functional theory - Wikipedia

    en.wikipedia.org/wiki/Density_functional_theory

    This theorem has since been extended to the time-dependent domain to develop time-dependent density functional theory (TDDFT), which can be used to describe excited states. The second HK theorem defines an energy functional for the system and proves that the ground-state electron density minimizes this energy functional.

  3. Time-dependent density functional theory - Wikipedia

    en.wikipedia.org/wiki/Time-dependent_density...

    The formal foundation of TDDFT is the Runge–Gross (RG) theorem (1984) [1] – the time-dependent analogue of the Hohenberg–Kohn (HK) theorem (1964). [2] The RG theorem shows that, for a given initial wavefunction, there is a unique mapping between the time-dependent external potential of a system and its time-dependent density.

  4. List of theorems - Wikipedia

    en.wikipedia.org/wiki/List_of_theorems

    Japanese theorem for concyclic quadrilaterals (Euclidean geometry) John ellipsoid ; Jordan curve theorem ; Jordan–Hölder theorem (group theory) Jordan–Schönflies theorem (geometric topology) Jordan–Schur theorem (group theory) Jordan's theorem (multiply transitive groups) (group theory) Joubert's theorem ; JSJ theorem (3-manifolds)

  5. Nilpotent group - Wikipedia

    en.wikipedia.org/wiki/Nilpotent_group

    Lagrange's Theorem implies the intersection of H and K is equal to 1. By definition,P 1 P 2 ···P t = HK, hence HK is isomorphic to H×K which is equal to P 1 ×P 2 ×···×P t. This completes the induction. Now take t = s to obtain (d). (d)→(e) Note that a p-group of order p k has a normal subgroup of order p m for all 1≤m≤k.

  6. Multiple comparisons problem - Wikipedia

    en.wikipedia.org/wiki/Multiple_comparisons_problem

    A normal quantile plot for a simulated set of test statistics that have been standardized to be Z-scores under the null hypothesis. The departure of the upper tail of the distribution from the expected trend along the diagonal is due to the presence of substantially more large test statistic values than would be expected if all null hypotheses were true.

  7. Complete homogeneous symmetric polynomial - Wikipedia

    en.wikipedia.org/wiki/Complete_homogeneous...

    The formula above can be seen as a special case of the MacMahon master theorem. The right hand side can be interpreted as / where and = (, …,). On the left hand side, one can identify the complete homogeneous symmetric polynomials as special cases of the multinomial coefficient that appears in the MacMahon expression.

  8. Additional Mathematics - Wikipedia

    en.wikipedia.org/wiki/Additional_Mathematics

    In Hong Kong, the syllabus of HKCEE additional mathematics covered three main topics, algebra, calculus and analytic geometry. In algebra , the topics covered include mathematical induction , binomial theorem , quadratic equations , trigonometry , inequalities , 2D- vectors and complex number , whereas in calculus , the topics covered include ...

  9. Slowly varying function - Wikipedia

    en.wikipedia.org/wiki/Slowly_varying_function

    A function L is slowly varying if and only if there exists B > 0 such that for all x ≥ B the function can be written in the form = ⁡ (() + ())where η(x) is a bounded measurable function of a real variable converging to a finite number as x goes to infinity