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Computing the two first probability density functions of the random Cauchy-Euler differential equation: Study about regular-singular points

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Fig. 1

Top: Plots of the 1-PDF of the solution SP, W(u), to the random IVP (4) with u0 = 1 given in (8), (11), (13) in Cases I–III at different values of u ∊ {2,3,...,10}. Bottom: Plots of the 1-PDF of the solution SP, V(s), to the random IVP (17) with s0 = 0.5 given in (19), (20), (22) in Cases I–III at different values of s ∊ {0.05,0.1,...,0.5}.
Top: Plots of the 1-PDF of the solution SP, W(u), to the random IVP (4) with u0 = 1 given in (8), (11), (13) in Cases I–III at different values of u ∊ {2,3,...,10}. Bottom: Plots of the 1-PDF of the solution SP, V(s), to the random IVP (17) with s0 = 0.5 given in (19), (20), (22) in Cases I–III at different values of s ∊ {0.05,0.1,...,0.5}.

Fig. 2

Top: Plots of the mean, μW(u), and plus/minus the standard deviation, σW(u), of the solution SP, W (u), to IVP (4) in Cases I–III at different values of u ε [1,10]. Bottom: Plots of the mean, μV(s), and plus/minus the standard deviation, σV(s), of the solution SP, V (s), to IVP (17) in Cases I–III at different values of s ε [0.05,0.5].
Top: Plots of the mean, μW(u), and plus/minus the standard deviation, σW(u), of the solution SP, W (u), to IVP (4) in Cases I–III at different values of u ε [1,10]. Bottom: Plots of the mean, μV(s), and plus/minus the standard deviation, σV(s), of the solution SP, V (s), to IVP (17) in Cases I–III at different values of s ε [0.05,0.5].

Fig. 3

Covariance function given by (3) in the Case I to both problems, IVP (4) (left) and IVP (17) (right) for the values of u1,u2 ε [1,3] and s1,s2 ε [0.05,0.5].
Covariance function given by (3) in the Case I to both problems, IVP (4) (left) and IVP (17) (right) for the values of u1,u2 ε [1,3] and s1,s2 ε [0.05,0.5].

Columns p1 and p2 = 1 − p1 collect the values of the probabilities given by (25) corresponding to Cases I–III, when Ji ~ N(μi,Σ), being μi and Σ specified in (24). Values of ps represent the probabilities associated with asymptotic stability according to (26).

Casesp1p2ps
I0.9785240.0214760.966055
II0.5303940.4696060.966054
III0.0451710.9548290.999866
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Inglese
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Volume Open
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Life Sciences, other, Mathematics, Applied Mathematics, General Mathematics, Physics