34 research outputs found
Inverse Laplace Transform of Some Rational Functions
In this paper we propose a formula of recurrent nature for calculating the inverse Laplace transforms of some rational functions. The procedure and formulae enabling to determine the values of coefficients of obtained series are presented. Proposed procedure does not require any partial fraction decomposition. Moreover, it is proved that the radius of convergence of the received series (for the respective objective function) is equal to infinity. The proposed formula can find applications in wave optics and acoustics
Fibonacci and Lucas Numbers for Real Indices and Some Applications
In this paper the notion of the Fibonacci and Lucas numbers is extended onto real indices. Next, these new numbers are used for calculating real powers of certain matrices. The presented method to the extension of elements of linear recurrence sequence to real indices ought to find practical application in wide understanding metrology and medical diagnostics
Inverse Laplace Transform of Some Rational Functions
In this paper we propose a formula of recurrent nature for calculating the inverse Laplace transforms of some rational functions. The procedure and formulae enabling to determine the values of coefficients of obtained series are presented. Proposed procedure does not require any partial fraction decomposition. Moreover, it is proved that the radius of convergence of the received series (for the respective objective function) is equal to infinity. The proposed formula can find applications in wave optics and acoustics
W艂asno艣膰 Darboux 蟽-addytywnych nieujemnych miar bezatomowych i sko艅czenie wymiarowych miar wektorowych
In the paper some facts connected with Darboux property
of the positive measures and the finite dimensional vector measures are
discussed.W artykule omawiane s膮 pewne fakty zwi膮zane z w艂asno艣ci膮
Darboux miar nieujemnych i miar wektorowych sko艅czenie wymiarowych
O pewnych intryguj膮cych granicach - kontynuacja
Witu艂a and S艂ota in [College Math. J. 42 (2011), 328] proposed
a way of proving the relation (1) given below which appeared to be
a genuine result. Authors of the present paper, inspired by the form of this
limit, try to find some generalizations of this one, also in the context of
some special functions (e.g. the gamma function, the generalized Laguerre
polynomials).Witu艂a i S艂ota w notce [College Math. J. 42 (2011), 328]
zaproponowali udowodnienie relacji (1), podanej poni偶ej, kt贸ra wydaje si臋
bardzo ciekaw膮 zale偶no艣ci膮. Autorzy niniejszego artyku艂u, zainspirowani postaci膮
tej granicy, pr贸buj膮 znale藕膰 r贸偶ne jej uog贸lnienia tak偶e w kontek艣cie
pewnych funkcji specjalnych (np. funkcji gamma, uog贸lnionych wielomian贸w
Laguerre鈥檃)
Podstawowe w艂asno艣ci macierzy pe艂nych
In this paper the, so called, full matrices are distinguished.
A number of basic properties of such matrices are also presented. Moreover,
few possible directions for further research are indicated.W artykule wyr贸偶niono tzw. macierze pe艂ne. Przedstawiono wiele podstawowych w艂asno艣ci tych macierzy. Wskazano te偶 kilka
mo偶liwych kierunk贸w bada艅
Szeregi iterowanych logarytm贸w
In this paper certain properties of the series of iterated
logarithms are discussed in more general context.W artykule pewne w艂asno艣ci szereg贸w iterowanych logarytm贸w
s膮 rozwa偶ane w znacznie og贸lniejszym kontek艣cie
Sumy wymiernych pot臋g pierwiastk贸w wielomian贸w stopnia trzeciego
W artykule przedstawiono elementarn膮 metod臋 generowania r贸wno艣ci i to偶samo艣ci trygonometrycznych. Mi臋dzy innymi wyprowadzono r贸wno艣ci zwi膮zane z pierwiastkami wielomianu Perrina oraz otrzymano uog贸lnienia znanych r贸wno艣ci Ramanujana.In this paper a completely elementary method of generating the trigonometric equalities and identities is presented. Among them, the equalities connected with roots of Perrin鈥檚 polynomial and the generalizations of known Ramanujan鈥檚 equalities are proven
Variations on the arbelos
We recall the ancient notion of arbelos and introduce a number of concepts generalizing it. We follow the ideas presented by J. Sondow in his article on parbelos, the parabolic analogue of the classic arbelos. Our concepts concern the curves constructed of arcs which resemble each other and surfaces obtained in a similar way. We pay special attention to ellarbelos, the curves built of semi-ellipses, because of their possible application in engineering, e.g. in determining the static moments of arc rod constructions or in problems of structural stability and durability of constructions