Add truncated eigenvalue module

Author: bytesnake

Cargo.toml

@@ -28,6 +28,7 @@ num-traits  = "0.2"
 cauchy = "0.2.1"
 num-complex = "0.2.1"
 rand = "0.5"
+ndarray-rand = "0.11"
 
 [dependencies.ndarray]
 version = "0.13"
@@ -51,7 +52,6 @@ optional = true
 [dev-dependencies]
 paste = "0.1"
 criterion = "0.3"
-ndarray-rand = "0.11"
 
 [[bench]]
 name = "eigh"

src/lobpcg/lobpcg.rs

@@ -11,6 +11,7 @@ use ndarray::OwnedRepr;
 use num_traits::NumCast;
 
 /// Find largest or smallest eigenvalues
+#[derive(Debug, Clone)]
 pub enum Order {
     Largest,
     Smallest,