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Publications prior to 2004
Cicognani, M.; Colombini, F.: Sharp regularity of the coefficients
in the Cauchy Problem for a class of evolution equations.
Differential and Integral Equations 16 (2003), 1321-1344.
Cicognani, M; Zanghirati, L.: A general approach to the nonlinear
hyperbolic Cauchy problem with constant multiplicity.
Progress in analysis, Vol. I, II (Berlin, 2001), 1023-1035,
World Sci. Publishing, River Edge, NJ, 2003.
Cicognani, M.: Hyperbolic equations with non-absolutely continuous
coefficients. Progress in analysis, Vol. I, II (Berlin, 2001),
1037-1044, World Sci. Publishing, River Edge, NJ, 2003.
Cicognani, M.: The Cauchy problem for strictly hyperbolic operators
with non-absolutely continuous coefficients. Tsukuba J. Math. 27
(2003), 1-12.
Cicognani, M; Zanghirati, L.: Nonlinear hyperbolic Cauchy problems
in Gevrey classes. Chin. Ann. of Math. 22B (2001), 417-426.
Cicognani, M; Zanghirati, L.: Nonlinear Weakly Hyperbolic Equations
with Levi Condition in Gevrey Classes. Tsukuba J. Math. 25 (2001),
85-102.
Cicognani, M.: Nonlinear hyperbolic equations in Gevrey classes.
Proceedings of the Workshop Partial Differential Operators, Torino,
8-10 May, 2000, L. Rodino editor, 19-26.
Cicognani, M.; Zanghirati, L.: The Cauchy problem for
nonlinear hyperbolic equations with Levi condition. Bull.
Sci. Math. 123 (1999), 413-435.
Cicognani, M.; Zanghirati, L.: Well Posedness of the Cauchy Problem
for Nonlinear Weakly Hyperbolic Equations. Proceeding of the
Conference Partial Differential Equations and Their Applications,
Wuhan, China 5-9 April 1999, Chen H. and Rodino L. Editors, World
Scientific 1999, 51-66.
Cicognani, M.: Strictly Hyperbolic Equations with Non Regular
Coefficients with Respect to Time. Ann. Univ. Ferrara 45, In Memory
of Lamberto Cattabriga (1999), 45-58.
Cicognani, M.: On the strictly hyperbolic equations which are
H\"older continuous with respect to time. Ital. J. Pure Appl.
Math. 4 (1998), 73-82.
Cicognani, M; Zanghirati, L.: Analytic regularity for solutions of
nonlinear weakly hyperbolic equations. Boll. Unione Mat.
Ital. 11 (1997), 643-679.
Cicognani, M.: A remark about hyperbolic equations with
Log-Lipschitz coefficients. J. Partial Differ. Equations 10
(1997), 284-288.
Cicognani, M.; Zanghirati, L.: Quasilinear weakly hyperbolic
equations with Levi conditions. Rend. Semin. Mat. Torino 55 (1997),
123-144.
Cicognani, M.: On the well posedness in Gevrey classes and the
propagation of analyticity for strictly hyperbolic equations which
are Holder continuous with respect to time. C. R. Acad. Bulgare
Sci. 49 (1996), 19-22.
Cicognani, M.: The propagation of the analytic regularity in
nonlinear hyperbolic equations with constant multiplicity. Ann.
Univ. Ferrara 41 Suppl. (1995), 167-174.
Cicognani, M.; Zanghirati, L.: Quasi-linear weakly hyperbolic
equations with Gevrey-Levi conditions. Ann. Univ. Ferrara 41
(1995), 5-31.
Cicognani, M.; Zanghirati, L.: Propagation of analytic and Gevrey
regularity for a class of semi-linear weakly hyperbolic equations.
Rend. Semin. Mat. Univ. Padova 94 (1995), 99-111.
Cicognani, M.; Zanghirati, L.: Analytic regularity for solutions to
semilinear weakly hyperbolic equations. Rend. Semin. Mat.
Torino 51 (1993), 387-396.
Cicognani, M.; Zanghirati, L.: On a class of unsolvable
operators. Ann. Sc. Norm. Sup. Pisa 20 (1993), 357-369.
Cicognani, M.; Zanghirati, L.: Propagation of analytic and Gevrey
singularities for operators with noninvolutive
characteristics. J. Math. Kyoto Univ. 33 (1993),
633-646.
Cicognani, M.: Weakly hyperbolic equations with Lipschitz or
H\"older continuous coefficients with respect to time. Ann.
Univ. Ferrara 38 (1992), 193-215.
Cicognani, M.: The geometric optics for a class of hyperbolic
second order operators with H\"older coefficients with respect to
time. Ann. Sc. Norm. Sup. Pisa 13 (1991), 39-66.
Cicognani, M.: The propagation of Gevrey singularities for some
hyperbolic operators with coefficients H\"older continuous with
respect to time. Longman Scientific and Technical, π Pitman
Research. Notes in Math. 183 (1988), 38-58.
Cicognani, M.: Esistenza, unicità e propagazione della regolarità
della soluzione del problema di Cauchy per certi operatori
styrettamente iperbolici con coefficienti lipschitziani rispetto al
tempo. Ann. Univ. Ferrara 33 (1987), 259-292.
Cicognani, M.; Corli, A.: Propagation of singularities for
operators with constant coefficient hyperbolic-elliptic principal
part. Ann. Mat. Pura Appl. 147 (1987), 303-341.
