Reduction of the modified Poincaré differential equation to Birkhoff matrix form.
Matrix method for solving linear complex vector functional equations.
Principal values and principal subspaces of two subspaces of vector spaces with inner product.
A simple functional operator.
Cyclic complex vector functional equations.
Some higher order complex vector functional equations
In the present paper some complex vector functional equations of higher order without parameters and with complex parameters are solved.
Reduction of the modified Poincaré differential equation to Birkhoff matrix form
In this paper the reduction of the modified Poincaré linear differential equation with one -tuple regular singularity to the Birkhoff canonical matrix form is given.
Some complex vector systems of partial functional equations
In this paper some types of complex vector systems of partial linear and non-linear functional equations are solved.
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