Matrix init(symmetrical...) for flat list
Matrix init(symmetrical...) for flat list

mennovf/Swift-MathEagle,mennovf/Swift-MathEagle,rugheid/Swift-MathEagle,rugheid/Swift-MathEagle,rugheid/Swift-MathEagle,rugheid/Swift-MathEagle,mennovf/Swift-MathEagle