Simplify (i:Nat) >= 0 Fix bug with variable removal that meant loss of subtype information
Simplify (i:Nat) >= 0
Fix bug with variable removal that meant loss of subtype information


git-svn-id: 9ecf60ce9baff443e30a0472d3fd222fcb8117cf@5827 7b97033b-253e-4a5c-9b07-e25f9089a9fd

KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware