

1cROUTINE 
1cDESCRIPTION 


Xlahqr 
Computes the Schur decomposition of an upper 

Hessenberg matrix. 
Xgeqr2 
Computes the QR factorization of a matrix. 
sorm2r 
Applies a real orthogonal matrix in factored form. 
cunm2r 
Applies a complex orthogonal matrix in factored form. 
Xlascl 
Scales a matrix stably. 
Xlanhs 
Compute various matrix norms of a Hessenberg matrix. 
Xlacpy 
Perform a matrix copy. 
Xlamch 
Determine various machine parameters. 
[s,d]labad 
Determines over and underflow limits. 
[s,d]lapy2 
Compute stably. 
Xlartg 
Generates a plane rotation. 
[s,d]larfg 
Generates a real elementary reflector. 
[s,d]larf 
Applies a real elementary reflector H to a real
matrix. 
Xlaset 
Initialize a matrix. 