Duality in the general course of human affairs seems to be a juxtaposition of complementary or opposite concepts. This frequently leads to poetical sounding uses of language, both in the common language and in the precision of mathematical theorems. Thus the duality of Projective Geometry: Two points determine a line; two lines determine a point. Gergonne first introduced the word duality in ma...

Gabriele d’Annunzio was frequently excluded from the generative matrix of Italian poetical twentieth century. It is time to restore truth free any ideological biases. In order do that, it necessary retrace studies conducted by d’Annunzio’s successors who tried explore different ways reckon with his work. Studies that kind would make possible hypothesise a methodology use for systematic investig...