Second-order self-similar identities and multifractal decompositions Ka-Sing LauSze-man Ngai 28A8028A78self-similar measuresecond-order identitymultifractal formalism$L^q$-spectrumdimension spectrum Indiana University Mathematics Journal 2000 text pdf 10.1512/iumj.2000.49.1789 10.1512/iumj.2000.49.1789 en Indiana Univ. Math. J. 49 (2000) 925 - 972 state-of-the-art mathematics http://iumj.org/access/