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HJ Mulliner
HJ may refer to: Science, technology, and mathematics * Hall–Janko group, a mathematical group * Hamilton–Jacobi equation, an equation in classical mechanics which also has relations to quantum physics * U.S. code for a cryptographic key change; see cryptoperiod Other uses * , a two-letter combination used in some languages * hj-reduction in English, dropping the sound before * Hajji (Hj.), an Islamic honorific * Handjob * ''hic jacet'' ('here lies'), Latin phrase on gravestones * Hilal-i-Jurat, post-nominal for Pakistan honour * Hitler-Jugend (Hitler Youth) * Holden HJ, an Australian car 1974-1976 * Hot Jupiter, a type of planet * Tasman Cargo Airlines, IATA airline designator * ''Jiaguwen Heji ''Jiaguwen Heji'', abbreviated ''Heji'' or ''HJ'', is the standard comprehensive collection of rubbings of ancient Chinese oracle bone inscriptions. Compilation Under the last nine kings of the Shang dynasty (up to ), pieces of bone, usually ...'', the standard comprehe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hall–Janko Group
In the area of modern algebra known as group theory, the Janko group ''J2'' or the Hall-Janko group ''HJ'' is a sporadic simple group of Order (group theory), order : 604,800 = 2733527 : ≈ 6. History and properties ''J2'' is one of the 26 Sporadic groups and is also called Hall–Janko–Wales group. In 1969 Zvonimir Janko predicted J2 as one of two new simple groups having 21+4:A5 as a centralizer of an involution (the other is the Janko group J3). It was constructed by as a rank 3 permutation group on 100 points. Both the Schur multiplier and the outer automorphism group have order 2. As a permutation group on 100 points J2 has involution (mathematics)#group theory, involutions moving all 100 points and involutions moving just 80 points. The former involutions are products of 25 double transportions, an odd number, and hence lift to 4-elements in the Covering_groups_of_the_alternating_and_symmetric_groups, double cover 2.A100. The double cover 2.J2 occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |