When Raymond Roussel poses his 'equations of facts' as problems to be solved, as ideal facts or events which begin to resonate as an effect of an imperative of language, or as facts which are themselves fiats, when many modern novelists install themselves in this aleatory point, this imperative and questioning 'blind spot' from which the work develops like a problem by making divergent series resonate they are not doing applied mathematics, or employing a mathematical or physical metaphor.