Sommaire

Circular distance in directed graphs
p. 113-119
Magic powers of graphs
p. 121-124
Rees ideal algebras
p. 125-130
Factorization of Toeplitz and Hankel operators
p. 131-145
Unions of uniquely complemented lattices
p. 147-152
Spectral properties of fourth order differential operators
p. 153-168
Double $n$-ary relational structures
p. 169-174
Upper and lower solutions for singularly perturbed semilinear Neumann's problem
p. 175-180
Comparison theorems for differential equations of neutral type
p. 181-189
Inertial law of symplectic forms on modules over plural algebra
p. 191-196
On some properties of the class $\scr P(B,b,\alpha)$
p. 197-220
Book Reviews
p. 221-224