Symplectic Matrix: Mathematics, Real Number, Matrix (Mathematics), Complex Number

Unitary Matrix: Matrix (Mathematics), Complex Number, Identity Matrix, Conjugate Transpose, Hermitian Adjoint

Absolutely Convex Set: Set (mathematics), Real Number, Complex Number

Hessian Matrix: Mathematics, Matrix (mathematics), Partial derivative, Function Real number, Determinant, Optimization...

Scalar Mathematics: Mathematics, Scalar, Linear Algebra, Real Number, Vector Space, Multiplication, Field Complex Number