Flatten_Sig.Mat
val eye : int -> Symbol.Shape.Type.arr
TODO
val diagm : ?k:int -> Symbol.Shape.Type.arr -> Symbol.Shape.Type.arr
TODO
val triu : ?k:int -> Symbol.Shape.Type.arr -> Symbol.Shape.Type.arr
TODO
val tril : ?k:int -> Symbol.Shape.Type.arr -> Symbol.Shape.Type.arr
TODO