F. Colombini

activity

20102023

most citedTime-dependent loss of derivatives for hyperbolic operators with non regular coefficients

14 citations · 24 across the 12 of their papers we have counts for

collaborators

Showing 2017Show all

2 papers · 1 filter

math.AP2017

On the Cauchy problem for $D_{t}^{2} - D_{x} (b (t) a (x)) D_{x}$

Ferruccio Colombini, Tatsuo Nishitani

We consider the Cauchy problem for second order differential operators with two independent variables $P = D_{t}^{2} - D_{x} (b (t) a (x)) D_{x}$ . Assume that $b (t)$ is a nonnegative $C^{n, a l p ha}$ …

math.AP2017★ 2 cited

Weyl formula for the negative dissipative eigenvalues of Maxwell's equations

Ferruccio Colombini, Vesselin Petkov

Let $V (t) = e^{t G_{b}}, t \geq 0,$ be the semigroup generated by Maxwell's equations in an exterior domain $Ω \subset R^{3}$ with dissipative boundary condition $E_{tan}- γ(…

On the Cauchy problem for Dt2​−Dx​(b(t)a(x))Dx​

Weyl formula for the negative dissipative eigenvalues of Maxwell's equations

On the Cauchy problem for $D_{t}^{2} - D_{x} (b (t) a (x)) D_{x}$

Weyl formula for the negative dissipative eigenvalues of Maxwell's equations