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hep-th2008★ 890 cited
Class of viable modified gravities describing inflation and the onset of accelerated expansion
G. Cognola, E. Elizalde, S. Nojiri +3
A general approach to viable modified gravity is developed in both the Jordan and the Einstein frames. A class of exponential, realistic modified gravities is introduced and…
hep-th1998
Consistent, covariant and multiplicative anomalies
Guido Cognola, Sergio Zerbini
It is shown that the multiplicative anomaly in the vector-axial-vector model, which apparently has nothing to do with the breaking of classical current symmetries, nevertheless is…
hep-th1996
Zeta-function on the generalised cone
Guido Cognola, Sergio Zerbini
The analytic properties of the zeta-function for a Laplace operator on a generalised cone are studied in some detail using the Cheeger's approach and explicit expressions are given…