Heidegger's conception of science can be divided, for temporal and doctrinal reasons, into four phases:
1) a logical conception of science;
2) an existential conception of science;
3) metaphysical conception of science; and
4) an epochal conception of science. An important role is played in this by the scientific programme. If we follow which aspects of this scientific programme are stressed by Heidegger, and how he characterises that programme, we can see certain milestones in Heidegger's conception of science. "Basic concepts" (a logical conception of science), "objectivisation" (an existential conception of science) and the "mathematical" (a metaphysical conception of science) constitute the basis and foundations of modern science, and are also a central theme this study.