exporting positive? and negative? from lib-math (issue 62)
exporting positive? and negative? from lib-math (issue 62)

aisamanra/owl-lisp,yuriy-chumak/OL,aoh/owl-lisp,aisamanra/owl-lisp,yuriy-chumak/OL,yuriy-chumak/OL,yuriy-chumak/OL,aoh/owl-lisp,aisamanra/owl-lisp,yuriy-chumak/OL,aoh/owl-lisp,yuriy-chumak/OL