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The aim of this paper is to point out, against Heidegger’s interpretation, that Husserl’s categorial intuition is not to be considered as the analogon of the sense intuition. By analysing the relationship between Husserl’s early mathematical researchs and Brentano’s ontological interpretation of Aristotle, we are in position to emphasize the fundamental opposition between analogy and variation. Such an opposition is the very key of Husserl’s phenomenology as a non ontological theory of multiplicities, considered from the point of view of a pure logical grammar.