Compute the square root of a matrix
sqrtm_robust(m)
m
: squared matrix (KxK)squared matrix x (KxK) such that x
#' This function is a modified version of the "sqrtm_robust" function by Le and Singleton (2018).
"A Small Package of Matlab Routines for the Estimation of Some Term Structure Models."
(Euro Area Business Cycle Network Training School - Term Structure Modelling). Available at: https://cepr.org/40029
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