for A being non empty set
for S being non empty non void ManySortedSign
for x being MSAlgebra over S st x in MSAlg_set (S,A) holds
( the Sorts of x in Funcs ( the carrier of S,(bool A)) & the Charact of x in Funcs ( the carrier' of S,(PFuncs ((PFuncs (NAT,A)),A))) )