R/stationarity.R

In ccgarch: Conditional Correlation GARCH models

Defines functions stationarity

Documented in stationarity

# stationariry condition. 
# for details, see He and Ter\"{a}svirta (2004) and Nakatani and Ter\"{a}svirta (2007).
   stationarity <- function(A,B){
      G <- A + B
      max(Mod(eigen(G)$values))
   }

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