On étudie dans cet article l'apparence morphologique des plantes à travers des modèles géométriques et statiques puis on examine quelques caractères-clés des processus de croissance à la lumière des propriétés de certains systèmes différentiels.

The notion that our society, its education system and its intellectual life, is characterised by a split between two cultures – the arts or humanities on one hand and the sciences on the other – has a long history. But it was C. P. Snow's Rede lecture of 1959 that brought it to prominence and began a public debate that is still raging in the media today. This fiftieth anniversary printing of The Two Cultures and its successor piece, A Second (...) Look features an introduction by Stefan Collini, charting the history and context of the debate, its implications and its afterlife. The importance of science and technology in policy run largely by non-scientists, the future for education and research, and the problem of fragmentation threatening hopes for a common culture are just some of the subjects discussed. (shrink)

In this stimulating book, six leading philosophers--Karl-Otto Apel, Robert Brandom, Karsten Harries, Martha Nussbaum, Barry Stroud, and Allen Wood--consider the nature of philosophy. Although each of them has a unique perspective, they all seem to agree that philosophy seeks to uncover hidden assumptions and concepts in order to expose them to critical scrutiny. It is thus entirely fitting that philosophers should examine their own assumptions about the nature of their discipline. As they delve into the nature of philosophy, the authors (...) address many fascinating subjects: what makes philosophy different from natural science, religion, and other branches of the humanities; whether philosophy can contribute to political transformation, and if so, how; whether there can ever be an "end of philosophy"; and more. The editors' introduction ties together the contributors' diverse perspectives by noting common themes, similarities, and differences. (shrink)

Offering an original perspective on the central project of Descartes' Meditations, this book argues that Descartes' free will theodicy is crucial to his refutation of skepticism. A common thread runs through Descartes' radical First Meditation doubts, his Fourth Meditation discussion of error, and his pious reconciliation of providence and freedom: each involves a clash of perspectives-thinking of God seems to force conclusions diametrically opposed to those we reach when thinking only of ourselves. Descartes fears that a skeptic could exploit this (...) clash of perspectives to argue that Reason is not trustworthy because self-contradictory. To refute the skeptic and vindicate the consistency of Reason, it is not enough for Descartes to demonstrate that our Creator is perfect; he must also show that our errors cannot prove God's imperfection. To do this, Descartes invokes the idea that we err freely. However, prospects initially seem dim for this free will theodicy, because Descartes appears to lack any consistent or coherent understanding of human freedom. In an extremely in-depth analysis spanning four chapters, Ragland argues that despite initial appearances, Descartes consistently offered a coherent understanding of human freedom: for Descartes, freedom is most fundamentally the ability to do the right thing. Since we often do wrong, actual humans must therefore be able to do otherwise-our actions cannot be causally determined by God or our psychology. But freedom is in principle compatible with determinism: while leaving us free, God could have determined us to always do the good. Though this conception of freedom is both consistent and suitable to Descartes' purposes, when he attempts to reconcile it with divine providence, Descartes's strategy fails, running afoul of his infamous doctrine that God created the eternal truths. (shrink)