Lie Subalgebras of Finite Codimension in $\Gamma(TX)$ W. CurtisF. Miller Indiana University Mathematics Journal 1973 text pdf 10.1512/iumj.1973.22.22049 10.1512/iumj.1973.22.22049 en Indiana Univ. Math. J. 22 (1973) 595 - 601 state-of-the-art mathematics http://iumj.org/access/