max db.addvirtual alias bach.== bach.eq;
max db.addvirtual alias bach.!= bach.neq;
max db.addvirtual alias bach.< bach.lt;
max db.addvirtual alias bach.<= bach.leq;
max db.addvirtual alias bach.> bach.gt;
max db.addvirtual alias bach.>= bach.geq;
max db.addvirtual alias bach.* bach.times;
max db.addvirtual alias bach./ bach.div;
max db.addvirtual alias bach.mod* bach.modtimes;
