Please see the included file "COPYRIGHTS" in "inst" directory for details about licenses as well as copyrights.

In short: 

 - directories "Spectra" and "RMatOp" as well as files "RMatOp.h" and "SymEigs.h" are 
   licensed under the MPL-2 (a version of which is included in the file COPYRIGHT),

 - directory "rsvd" is licensed as BSD_3_clause.