Báo cáo toán học: "Quasitriangular algebras are "maximal" pptx
Báo cáo toán học: "A Note on Maximal Nonhamiltonian Burkard–Hammer Graphs" pptx
... notion
of split graphs was introduced in 1977 by F¨oldes and Hammer [4]. These graphs
are interesting because they are related to many problems in combinatorics (see
[3, 5, 10]) and in computer science ... graph, maximal nonhamiltonian split graph.
1. Introduction
All graphs considered in this paper are finite undirected graphs without loops
or multiple edges. If G is a graph, then V (G)...
Báo cáo toán học: " Minimal and maximal solutions to first-order differential equations with state-dependent deviated arguments" pptx
... along with a functional start condition, are
included in the framework of problem (1). This is not allowed in articles
[3–6].
(3) No monotonicity conditions are required for the functions f and τ, ... The
concepts of lower and upper solutions introduced in Section 2 are new, and
we show with an example that our existence results are false if we consider
lower and upper solutions in th...
Báo cáo toán học: " Maximal and minimal point theorems and Caristi’s fixed point theorem" docx
... several existence theorems of maximal
and minimal points are established. By using them, some generalized Caristi’s fixed
point theorems are proved, which improve Caristi’s fixed point theorem ... proof is complete.
Remark 1. The lower semicontinuity of and (H) necessarily assumed in [9,12-14 ]are
no longer necessary for Theorems 5 and 6. In what follows we shall show that Theorem
5 im...
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