The type of spectral transformation can be specified at run time (e.g., -st_type shift) as well as several parameters such as the value of the shift (e.g., -st_shift 1.5).
ST objects are always related to EPS objects. Users should not create a standalone ST object.
ST options can also be set directly in application codes by first extracting the ST context from the EPS context via EPSGetST() and then directly calling the ST routines (e.g., STSetType()/ STSetShift() ).
stfunc.c
stset.c
stsolve.c
stsles.c
stregis.c
shellmat.c
makefile