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Publications
Prof.
Sobhy
elsayed
ibrahim
elsayed
::
Publications:
Research Fields
Mathematics
Number of publications is 58
Title
1-
On the product of singular differential operators with their essential spectra in direct sum space
Abstract
2-
The General Differential Operators Generated by a Quasi-Differential Expressions with their Interior Singular Points
3-
On the essential spectra of general differential operators
4-
THE REGULARLY SOLVABLE OPERATORS IN p
Abstract
5-
Basic and General Concepts In Mathematics
6-
ON THE DEFICIENCY INDICES OF PRODUCT DIFFERENTIAL OPERATORS IN DIRECT SUM SPACES
7-
The Spectra and Regularity Fields of Product Differential Operators in the Direct Sum Spaces
Abstract
8-
ASIAN ACADEMIC RESEARCH JOURNAL OF MULTIDISCIPLINARY
9-
On the spectra of product singular differential operators in direct sum spaces
10-
On the integrable solutions of product integro differential equations in direct sum spaces
11-
The Products of Regularly Solvable Operators with Their Spectra in Direct Sum Spaces
12-
On the Product of Integro Differential Equations and Their Solutions in Direct Sum Spaces
13-
An Introduction to Calculus
14-
On the product of self-adjoint Sturm-Liouville differential operators in direct sum spaces
15-
An Introduction to Real analysis
16-
On the essential spectra for products of the general quasi-differential operators and their adjoints
17-
An Introduction in Sets of Numbers
18-
On the boundary conditions for products of general quasi-differential operators in direct sum spaces
19-
On the boundary conditions for products of regularly solvable operators
Full paper
20-
Advanced Calculus
21-
Basic and General Concepts in Mathematics
22-
The spectra of general differential operators in the direct sum spaces
23-
On the domain of selfadjoint extension of the product of Sturm-Liouville differential operators
24-
On the spectra of non-selfadjoint differential operators and their adjoints in direct sum spaces
25-
On the L w 2-boundedness of solutions for products of quasi-integro differential equations
26-
On the domain of selfadjoint extension of the product of Sturm-Liouville differential operators
27-
Singular self-adjoint boundary conditions for products of Sturm-Liouville differential operators
28-
The point spectra and regularity fields of general differential operators in direct sum spaces
29-
On the essential spectra of general differential operators
30-
On the boundary for products of Sturm-Liouville differential operators
31-
On the Lw2-Solutions of General Second-Order Nonsymmetric Differential Equations
32-
On the boundary conditions characterizing a general differential operators with a countable number of singular points
33-
Perturbations of products of general quasi-differential expressions
34-
The point spectra and regularity fields of products quasi-differential operators
35-
Boundedness and L2-boundedness of solutions of general quasi-integro differential equations
36-
On L_w^ 2-quasi-derivatives for solutions of perturbed general quasi-differential equations
37-
On the essential spectra of regularly solvable operators in the direct sum spaces
38-
On boundary conditions for Sturm-Liouville differential operators in the direct sum spaces
39-
The point spectra and regularity fields of products of quasi-differential operators
40-
The products of general quasi-differential operators and their essential spectra
41-
On the essential spectra of general differential operators
42-
Limit-Circle and Limit-point Classification of Second order Symmetric Differential Expression
43-
Boundedness for solutions of general quasi-integro differential equation
44-
The point spectra and regularity fields of non-selfadjoint quasi-differential operators
45-
Non Self-Adjoint Quasi-Differential Operators with Discrete Spectra
46-
The spectra of well-posed operators
47-
Boundedness for solutions of general ordinary quasi-differential equations
48-
Singular non-selfadjoint differential operators
49-
Boundary conditions for Sturm-Liouville differential operators
50-
Boundary conditions for regularly solvable operators in direct sum spaces
51-
3ULL. FAC. SCI., ASSIW UNIV., 22 (2-C), PP. 43-53 (1993). SQUAPE INTEGRABLE SOLUTIONS FOR GENERAL ORDINARY QUASI-DIFFERENTIAL EQUATIONS
52-
On the L w 2-boundedness of solutions for products of quasi-integro differential equations
53-
On the spectra of non-selfadjoint differential operators and their adjoints in direct sum spaces
54-
Nonself-adjoint Differential Operators in Direct Sum Spaces
55-
Boundary conditions for general ordinary differential operators and their adjoints
56-
Problems associated with differential operators: Thes.... doct. phylosophy
57-
Problems associated with differential operators
58-
Boundary conditions for general ordinary differential operators
