الأبحاث

صبحى السيد ابراهيم السيد

أستاذ متفرغ

كلية العلوم الرياضيات

On the essential spectra of general differential operators

1999

Limit-Circle and Limit-point Classification of Second order Symmetric Differential Expression

1998

Boundedness for solutions of general quasi-integro differential equation

1998

The point spectra and regularity fields of non-selfadjoint quasi-differential operators

1995

Non Self-Adjoint Quasi-Differential Operators with Discrete Spectra

1995

The spectra of well-posed operators

1995

Boundedness for solutions of general ordinary quasi-differential equations

1994

Singular non-selfadjoint differential operators

1994

Boundary conditions for Sturm-Liouville differential operators

1993

Boundary conditions for regularly solvable operators in direct sum spaces

1993

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Mathematics