26 pagesThinking space and time together We propose to think together the concepts of space and time: they involve the same degrees of freedom of the elements of the world and always work in tandem. Their foundations are to be discussed, not inside a thinking of substance (each is defined by a series of characters of its own) but inside a thinking of relation (each is defined in opposition to the other). We oppose spatial relations to temporal relations, or relative immobility to relative mobility relations. The decision of the boundary between the two is subject to arbitrary (we have a great flexibility in the definitions of the associated space and time parameters) and does not avoid logical and conceptual difficulties similar to those en...