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Portugaliae mathematica
Tome 40 (1981)
Précédent
Suivant
Sommaire du
Fascicule no. 1
On the foundations of Topology
Lintz, R.G.
p. 1-39
Sur quelques algèbres de la Logique
Porta, Horácio
p. 41-77
On two properties of Zorn type for locally convex spaces
Aragona, Jorge
p. 79-95
Best approximation and the numerical solution of partial differential equations with the tau method
Namasivayam, S.
;
Ortiz, Eduardo L.
p. 97-119
Sommaire du
Fascicule no. 2
Système déterminant de l'algèbre de Morgan libre sur un ensemble ordonné fini
Figallo, Aldo
;
Monteiro, Luiz
p. 129-135
Thom-Boardman singularities and monoidal transforms
Mount, K.R.
;
Villamayor, O.E.
p. 137-220
Trigonometric series with gaps
Clunie, J.
p. 221-230
Sur les ouverts semi-algébriques d'une clôture réelle
Dickmann, M.A.
p. 231-238
Nonnegative point spectrum for differential equations with infinite delays
Ferreira, José M.
p. 239-251
A direct sum is holomorphically bornological with the topology induced by a cartesian product
Barroso, Jorge Alberto
;
Nachbin, Leopoldo
p. 252-256
Sommaire du
Fascicule no. 3
Rings admitting torsion injective covers
Ahsan, J.
;
Enochs, E.
p. 257-261
Equivalência de sistemas de gradiente
Basto Gonçalves, J.
p. 263-277
Closed-form solution of a singular nonlinear integral equation
Hatcher, John R.
p. 279-286
Intersections and algebraic sums of Musielak-Orlicz spaces
Hudzik, H.
p. 287-296
$\lambda $
-primitive roots
Vegh, Emanuel
p. 297-303
Jointly prescalar sets in Banach algebras
Thomas, Gary M.
p. 305-310
Quotient rings from right ideals
Hentzel, Irvin Roy
p. 311-312
Sums of three squares in certain Cayley rings
Hardy, J.T.
p. 313-323
Rings satisfying a certain idempotency condition
Putcha, Mohan S.
;
Yaqub, Adil
p. 325-328
Reduced near-rings
Szeto, George
;
Wong, Yuen-Fat
p. 329-334
A generalization of Hille's and Robinson's functional equations
Haruki, Hiroshi
p. 335-343
Classes of barrelled spaces related with the closed graph theorem
Valdivia, M.
p. 345-366
A radical between Jacobson and Brown-McCoy radicals
Manley, P.L.
p. 367-368
Sommaire du
Fascicule no. 4
On the first mixed problem for a parabolic equation with right side in
$L_{loc}^2$
Hassan, M.I.
p. 369-375
Uniformly continuous functions on compact semigroups
Chivukula, R. Rao
p. 377-382
An approximation theorem for semigroups of operators
Olubummo, A.
p. 383-391
Free subgroups in the endomorphism ring of an Abelian free group
Haimo, Franklin
p. 393-398
A note on an integral operator involving Legendre functions
Habibullah, G.M.
p. 399-403
On maps of spaces determined by countable subspaces
Karnik, S.M.
p. 405-412
A note on extreme contractions on
$\ell _p$
-spaces
Grzaslewicz, Ryszard
p. 413-419
Banach-Steinhauss theorem in quasi normed spaces
Narang, T.D.
p. 421-425
Truncated units in the algebraic number field
$Q(w)$
, where
$w^n=a+bw$
,
$n\ge 3$
Ozeki, K.
p. 427-431
Positive stable laws and M-scheme
Pestana, Dinis
p. 433-438
Functions with negative coefficients
Gupta, V.P.
p. 439-448
On certain classes of analytic functions
Owa, Shigeyoshi
p. 449-456
Existence of open quasiconvex subsets dense in a given space
Bolondi, Giorgio
p. 457-462
Unbounded components of solutions for equations of Birkhoff-Kellogg type
Massabo, I.
p. 463-467
Nearness and uniform type structures
Carlson, John W.
p. 469-479