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  2. Harmonized System - Wikipedia

    en.wikipedia.org/wiki/Harmonized_System

    Statistical suffixes are often added to the 8-digit tariff code for a total of 10 digits. If the number of digits are more than 6, additional digits are called as the national subdivision. Chapter 77 is reserved for future use by the HS. Chapters 98 and 99 are reserved for domestic use for the Contracting Parties to the HS Convention.

  3. Isotopes of hassium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_hassium

    The direct synthesis of 269 Hs has resulted in the observation of three alpha particles with energies 9.21, 9.10, and 8.94 MeV emitted from 269 Hs atoms. However, when this isotope is indirectly synthesized from the decay of 277 Cn, only alpha particles with energy 9.21 MeV have been observed, indicating that this decay occurs from an isomeric ...

  4. Unified numbering system - Wikipedia

    en.wikipedia.org/wiki/Unified_numbering_system

    An advisory board was established in April 1972 to establish the Unified Numbering System (UNS). [2] The UNS is managed jointly by the ASTM International and SAE International. The resulting document SAE HS-1086 provides a cross-reference between various designation systems and the chemical composition.

  5. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    lb – binary logarithm (log 2). (Also written as ld.) lcm – lowest common multiple (a.k.a. least common multiple) of two numbers. LCHS – locally compact Hausdorff second countable. ld – binary logarithm (log 2). (Also written as lb.) lsc – lower semi-continuity. lerp – linear interpolation. [5] lg – common logarithm (log 10) or ...

  6. Latin letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Latin_letters_used_in...

    the digit "ten" in hexadecimal [2] and other positional numeral systems with a radix of 11 or greater [3] the unit ampere for electric current in physics [4] the area of a figure [5] the mass number or nucleon number of an element in chemistry [6] the Helmholtz free energy of a closed thermodynamic system of constant pressure and temperature [7]

  7. ISO 31-11 - Wikipedia

    en.wikipedia.org/wiki/ISO_31-11

    ISO 31-11:1992 was the part of international standard ISO 31 that defines mathematical signs and symbols for use in physical sciences and technology. It was superseded in 2009 by ISO 80000-2:2009 and subsequently revised in 2019 as ISO-80000-2:2019 .

  8. List of glossing abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_glossing_abbreviations

    alternative meanings of ambiguous morpheme, e.g. 2/3 for a morpheme that may be either 2nd or 3rd person, or DAT/GEN for a suffix used for both dative and genitive. [ 27 ] [ 6 ] [optional in place of period] a morpheme indicated by or affected by mutation, as in Väter-n (father\ PL-DAT.PL ) "to (our) fathers" (singular form Vater )

  9. Hilbert–Schmidt operator - Wikipedia

    en.wikipedia.org/wiki/Hilbert–Schmidt_operator

    [5] A bounded linear operator T : H → H is Hilbert–Schmidt if and only if the same is true of the operator | |:=, in which case the Hilbert–Schmidt norms of T and |T| are equal. [5] Hilbert–Schmidt operators are nuclear operators of order 2, and are therefore compact operators. [5]