“…This book became very popular and somehow imposed the ULT as a "standard" tool for solving constant coefficient differential equations. We can say that it is "the" LT for most mathematicians and scientists, even if it poses difficulties in the initial valued problems [12][13][14].…”
Section: One-sided Laplace Transformmentioning
confidence: 99%
“…Gives a justification for Heaviside's operations, while giving insights into generalizations to the fractional case [13], 3.…”
This paper reviews the unilateral and bilateral, one- and two-dimensional Laplace transforms. The unilateral and bilateral Laplace transforms are compared in the one-dimensional case, leading to the formulation of the initial-condition theorem. This problem is solved with all generality in the one- and two-dimensional cases with the bilateral Laplace transform. General two-dimensional linear systems are introduced and the corresponding transfer function defined.
“…This book became very popular and somehow imposed the ULT as a "standard" tool for solving constant coefficient differential equations. We can say that it is "the" LT for most mathematicians and scientists, even if it poses difficulties in the initial valued problems [12][13][14].…”
Section: One-sided Laplace Transformmentioning
confidence: 99%
“…Gives a justification for Heaviside's operations, while giving insights into generalizations to the fractional case [13], 3.…”
This paper reviews the unilateral and bilateral, one- and two-dimensional Laplace transforms. The unilateral and bilateral Laplace transforms are compared in the one-dimensional case, leading to the formulation of the initial-condition theorem. This problem is solved with all generality in the one- and two-dimensional cases with the bilateral Laplace transform. General two-dimensional linear systems are introduced and the corresponding transfer function defined.
“…where according with many authors the condition a = I 1−α 0+ ϕ(t) t=0 is considered a technical initial condition, mainly due to the Laplace transform and without a good physical interpretation [6,7,8,9,14,15,16,17,22,23,24,28].…”
Section: Preliminariesmentioning
confidence: 99%
“…The initial condition problem for fractional linear systems is a subject under strong consideration [14,15,16,17,22,23,24,28]. Several authors claim that the Riemann-Liouville derivative leads to initial conditions without physical meaning.…”
Fractional systems with Riemann-Liouville derivatives are considered. The initial memory value problem is posed and studied. We obtain explicit steering laws with respect to the values of the fractional integrals of the state variables. The Gramian is generalized and steering functions between memory values are characterized.
“…One of the difficulties often found by researchers consists of the initialization of fractional differential equations. In fact, while classical integer order systems require a finite set of initial conditions, fractional operators have an intrinsic memory of the phenomena that is translated into the requirement for a proper initialization and, eventually, to an infinite set of initial conditions [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. The problem becomes even more intricate when we verify that there are several possible definitions for the fractional operators, that may lead to the requirement either of integer or of fractional order initial conditions.…”
a b s t r a c tFractional dynamics is a growing topic in theoretical and experimental scientific research. A classical problem is the initialization required by fractional operators. While the problem is clear from the mathematical point of view, it constitutes a challenge in applied sciences. This paper addresses the problem of initialization and its effect upon dynamical system simulation when adopting numerical approximations. The results are compatible with system dynamics and clarify the formulation of adequate values for the initial conditions in numerical simulations.
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