“…Theorem 3 provides an extension of the well known Cauchy condensation test for convergence. The extension of Cauchy's test for quasi-monotone sequences was proved by Shah (2) and Szasz (4).…”
Section: Definition 2 a Sequence {A N } Is Said To Be (Jj) S)-monotmentioning
The object of this note is to generalize the notion of quasi-monotony for sequences of real numbers and to prove corresponding generalizations of certain known theorems. First, we recall the definition of quasi-monotony.
“…Theorem 3 provides an extension of the well known Cauchy condensation test for convergence. The extension of Cauchy's test for quasi-monotone sequences was proved by Shah (2) and Szasz (4).…”
Section: Definition 2 a Sequence {A N } Is Said To Be (Jj) S)-monotmentioning
The object of this note is to generalize the notion of quasi-monotony for sequences of real numbers and to prove corresponding generalizations of certain known theorems. First, we recall the definition of quasi-monotony.
“…The 1'e ult (2) has been generalized to the quasimonotone case by O. Szasz [6] and if the integral exists, then (1 ) holds. Kl'i hnan [9] has pointed out LhaL in cerLain (nonLrivial) cases a s tl'onger result than (1) is true, namely, (6) .1 0 for all sufficienLly small positive h ; ind eed :…”
Section: Jo --- () < W~'"mentioning
confidence: 99%
“…Kl'i hnan [9] has pointed out LhaL in cerLain (nonLrivial) cases a s tl'onger result than (1) is true, namely, (6) .1 0 for all sufficienLly small positive h ; ind eed :…”
Two general t heorems giving condit,ions to insure the truth of the relationJo are established. In addition , several cases involvi ng Bessel function s are disc ussed.
“…For succinct formulation the «th partial sums of the Fourier series of / e Ll(0, it] are denoted Sn(f) = Sn(f, x). Also recall (Szasz [8]) that a null sequence {a(n)} is said to be quasi-monotone if, for some a > 0, a(n)/na J, for n 3* n0(a). An analogous result holds for sine series.…”
Abstract.A result concerning integrability of f(is the pointwise limit of certain cosine (sine) series and £.(•) is slowly vary in the sense of Karamata [5] is proved. Our result is an excluded" case in more classical results (see [4]) and also generalizes a result of G. A. Fomin [1]. Also a result of Fomin and Telyakovskii [6] concerning 0 -convergence of Fourier series is generalized. Both theorems make use of a generalized notion of quasi-monotone sequences.
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