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On the redundancy of operators and the bispectrum in the most general second-order scalar-tensor theory
redundancy operators bispectrum general second-order scalar-tensor theory
2011/10/19
In this short note we explain how to use the linear equation of motions to simplify the third-order action for the cosmological fluctuations. No field redefinition is needed in this exact procedure wh...
Cauchy Problem and Green's Functions for First Order Differential Operators and Algebraic Quantization
First Order Differential Operators Algebraic Quantization
2010/3/19
Existence and uniqueness of global solutions to the Cauchy problem and of unique advanced and retarded fundamental solutions (Green's functions) will be proved for a general class of first order linea...