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  2. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.

  3. Indian Certificate of Secondary Education - Wikipedia

    en.wikipedia.org/wiki/Indian_Certificate_of...

    The Indian Certificate of Secondary Education (ICSE) is a certificate awarded upon satisfactory result in an examination conducted by the Council for the Indian School Certificate Examinations, a private board designed to provide an examination in a course of general education, in accordance with the recommendations of the New Education Policy 2020 (), through the medium of English.

  4. E8 (mathematics) - Wikipedia

    en.wikipedia.org/wiki/E8_(mathematics)

    The designation E 8 comes from the Cartan–Killing classification of the complex simple Lie algebras, which fall into four infinite series labeled A n, B n, C n, D n, and five exceptional cases labeled G 2, F 4, E 6, E 7, and E 8. The E 8 algebra is the largest and most complicated of these exceptional cases.

  5. Closed-form expression - Wikipedia

    en.wikipedia.org/wiki/Closed-form_expression

    The quadratic formula =. is a closed form of the solutions to the general quadratic equation + + =. More generally, in the context of polynomial equations, a closed form of a solution is a solution in radicals; that is, a closed-form expression for which the allowed functions are only n th-roots and field operations (+,,, /).

  6. Vacuum solution (general relativity) - Wikipedia

    en.wikipedia.org/wiki/Vacuum_solution_(general...

    Kasner metric (An anisotropic solution, used to study gravitational chaos in three or more dimensions). These all belong to one or more general families of solutions: the Weyl vacua (Hermann Weyl) (the family of all static vacuum solutions), the Beck vacua (Guido Beck 1925 [2]) (the family of all cylindrically symmetric nonrotating vacuum ...

  7. Selina Hastings, Countess of Huntingdon - Wikipedia

    en.wikipedia.org/wiki/Selina_Hastings,_Countess...

    Selina Shirley was born in August 1707 at Astwell Castle, Northamptonshire, second daughter of Washington Shirley, 2nd Earl Ferrers, and Mary Levinge, daughter of Sir Richard Levinge, 1st Baronet. The family moved to Staunton Harold Hall , in Leicestershire when she was 17 and in 1728, she married Theophilus Hastings, 9th Earl of Huntingdon ...

  8. Selene - Wikipedia

    en.wikipedia.org/wiki/Selene

    The Greek word mene, meant the moon, and the lunar month. [8] The masculine form of mene ( men ) was also the name of the Phrygian moon-god Men . [ 9 ] Mene and Men both derive from Proto-Hellenic *méns ("month"), itself from Proto-Indo-European *mḗh₁n̥s (meaning moon, the lunar month), which probably comes from the root *meh₁- ("to ...