public SDVariable cross(String name, SDVariable a, SDVariable b) {
    SDValidation.validateNumerical("cross", "a", a);
    SDValidation.validateNumerical("cross", "b", b);
    SDVariable out =  new org.nd4j.linalg.api.ops.impl.shape.Cross(sd,a, b).outputVariable();
    return sd.updateVariableNameAndReference(out, name);