gr-math is a XeLaTeX package. It is based on the grmath babel package by Apostolos Syropoulos. It can be used without babel. gr-math's purpose is to redefine mathematics operators in Greek. Also, offers some macros for operators that are common in Greek school mathematics.
The macros of the package are:
\sin, \cos, \tan, \arcsin, \arccos, \arctan, \cot, \sec, \csc, \arccot, \arcsec, \arccscand\gcd.gr-mathredefines these in Greek.\lcm. Least common multiple operator.\limdisplay.\limoperator in display mode.\parallel.gr-mathredefines the operator\parallel. The parallel lines of the symbol appear sloped.\rightangle. A symbol for the right angle.
Clone repository gr-math under ~/texmf/tex/xelatex/.
As usual, load the package in the preable of the document
\usepackage{gr-math}For an overview see overview-gr-math.pdf.