TY - JOUR
T1 - Symplectic spaces and pairs of symmetric and nonsingular skew-symmetric matrices under congruence
AU - Bovdi, Victor A.
AU - Horn, Roger A.
AU - Salim, Mohamed A.
AU - Sergeichuk, Vladimir V.
N1 - Funding Information:
The work was supported in part by the UAEU UPAR grants G00001922 and G00002160 .
Publisher Copyright:
© 2017 Elsevier Inc.
PY - 2018/1/15
Y1 - 2018/1/15
N2 - Let F be a field of characteristic not 2, and let (A,B) be a pair of n×n matrices over F, in which A is symmetric and B is skew-symmetric. A canonical form of (A,B) with respect to congruence transformations (STAS,STBS) was given by Sergeichuk (1988) [25] up to classification of symmetric and Hermitian forms over finite extensions of F. We obtain a simpler canonical form of (A,B) if B is nonsingular. Such a pair (A,B) defines a quadratic form on a symplectic space, that is, on a vector space with scalar product given by a nonsingular skew-symmetric form. As an application, we obtain known canonical matrices of quadratic forms and Hamiltonian operators on real and complex symplectic spaces.
AB - Let F be a field of characteristic not 2, and let (A,B) be a pair of n×n matrices over F, in which A is symmetric and B is skew-symmetric. A canonical form of (A,B) with respect to congruence transformations (STAS,STBS) was given by Sergeichuk (1988) [25] up to classification of symmetric and Hermitian forms over finite extensions of F. We obtain a simpler canonical form of (A,B) if B is nonsingular. Such a pair (A,B) defines a quadratic form on a symplectic space, that is, on a vector space with scalar product given by a nonsingular skew-symmetric form. As an application, we obtain known canonical matrices of quadratic forms and Hamiltonian operators on real and complex symplectic spaces.
KW - Hamiltonian operators
KW - Pairs of symmetric and skew-symmetric matrices
KW - Symplectic congruence
KW - Symplectic spaces
UR - http://www.scopus.com/inward/record.url?scp=85030152308&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85030152308&partnerID=8YFLogxK
U2 - 10.1016/j.laa.2017.09.026
DO - 10.1016/j.laa.2017.09.026
M3 - Article
AN - SCOPUS:85030152308
SN - 0024-3795
VL - 537
SP - 84
EP - 99
JO - Linear Algebra and Its Applications
JF - Linear Algebra and Its Applications
ER -