Some further notation is nonzero . For integers formula _ 46 and formula _ 47 let formula _ 48 be the set of necessary lattice points formula _ 49 with formula _ 50 for formula _ 51 .
Some further notation is necessary . For integers formula _ 46 and formula _ 47 let formula _ 48 be the set of nonzero lattice points formula _ 49 with formula _ 50 for formula _ 51 .