PN: We talked about fractals in connexion with theinfinity row–this way of letting music grow in whatyou could call open hierarchic layers. It's not adirector and a slave; it's an interdependent way ofproducing music. If you choose a scale — forinstance, the chromatic scale — it contains itselfan infinite number of times; my Second Symphony isbased on realizing this characteristic. But ifinstead of letting it move in this expansive way,where you get wider and wider waves, you thenconstruct it in the opposite way, you get a figurewhere it never gets out of itself. But it createsstill a fractal rhythmic figure, which was veryinspiring for me in all my percussion music from the1970s. I discovered that feature in the beginning ofthe 70s when I composed the Third Symphony. I foundthe infinity row at the end of the 50s, but it wasnot until I had composed the Third Symphony and someworks before it that I realized it contained itsdark side, which is just as rhythmic and just ashierarchic. In my Third Symphony it comes out likean inevitable development. If you imagine the placein the beginning where it gets up to a very hightrill, it comes in lower at half-tempo, and thenagain more slowly further down. It contains itself,like a Russian doll or a Chinese box.