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  1.  62
    La matière chez Plotin: son origine, sa nature.Denis O'Brien - 1999 - Phronesis 44 (1):45-71.
    The origin of matter is one of the last and greatest unsolved mysteries bedevilling modern attempts at understanding the philosophy of the "Enneads." There are two stages in the production of Intellect and of soul. The One or Intellect produces an undifferentiated other, which becomes Intellect or soul by itself turning towards and looking towards the prior principle, with no possibility of the One's "turning towards" or "seeing" itself. But where does matter come from? To arrive at his conception of (...)
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  2. Theories of Weight in the Ancient World: Four Essays on Democritus, Plato and Aristotle. A Study in the Development of Ideas. 2. Plato: Weight and Sensation. The Two Theories of the 'Timaeus'. [REVIEW]Denis O'Brien - 1984 - Brill.
  3.  22
    Empedocles' Cosmic Cycle.Denis O'Brien - 1967 - Classical Quarterly 17 (01):29-.
    Hitherto reconstructions of Empedocles' cosmic cycle have usually been offered as part of a larger work, a complete history of Presocratic thought, or a complete study of Empedocles. Consequently there has perhaps been a lack of thoroughness in collecting and sifting evidence that relates exclusively to the main features of the cosmic cycle.
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  4.  11
    The Relation of Anaxagoras and Empedocles.Denis O'Brien - 1968 - Journal of Hellenic Studies 88:93-113.
  5. Perception et intelligence dans le Timée de Platon.Denis O'Brien - 1997 - In T. Calvo & L. Brisson (eds.), Interpreting the Timaeus – Critias. Proceedings of the IV Symposium Platonicum. Selected papers. pp. 291--305.
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  6. Democritus, Weight and Size: An Exercise in the Reconstruction of Early Greek Philosophy.Denis O'Brien - 1981 - Brill.
  7. Socrates and Protagoras on Virtue.Denis O'Brien - 2003 - In David Sedley (ed.), Oxford Studies in Ancient Philosophy, Volume Xxiv: Summer 2003. Oxford University Press.
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  8.  8
    Derived Light and Eclipses in the Fifth Century.Denis O'Brien - 1968 - Journal of Hellenic Studies 88:114-127.
  9.  16
    Hermann Diels on the Presocratics: Empedocles' Double Destruction of the Cosmos (Aetius Ii 4.8).Denis O'Brien - 2000 - Phronesis 45 (1):1-18.
    Stobaeus records a placitum where Empedocles says that the world is destroyed by the domination in turn of Love and of Strife. The placitum makes perfectly good sense in the context of Empedocles' belief that Love and Strife produce, in turn, a non-cosmic state of total unity (Love) and of total separation (Strife). But for over two hundred years scholars have been unable to hear that simple message. Sturz (1805) emended the text so as to make it fit the non-cyclical (...)
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  10.  2
    The Paradox of Change in Plato's Theaetetus. Part I. An Emendation of the Text (155b1-2) and the Origin of Error.Denis O'Brien - 2013 - Elenchos 34 (1):33-58.
    The text of Theaetetus 155b1-2 as recorded in the manuscripts and printed in current editions of the dialogue is marked by a syntactical anomaly and a logical non sequitur. Attempts at emendation by Proclus, Stephanus and Campbell have all been unsuccessful. To find the way back to Plato's original text, the reader will have to fight his way through a logical tangle and abandon the modish, but erroneous, belief that there is no difference in ancient Greek between ``complete'' and ``incomplete'' (...)
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  11.  23
    Empedocles' Cosmic Cycle: A Reconstruction From the Fragments and Secondary Sources.Denis O'Brien - 1969 - London: Cambridge University Press.
  12. Théodicée Plotinienne, Théodicée Gnostique.Denis O'Brien - 1993 - Brill.
    Plotinus : a detailed study of Plotinus' theories on matter and the soul , in relation to select passages from his treatise Against the Gnostics.
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  13. Pour Interpréter Empédocle.Denis O'Brien - 1981 - Brill.
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  14.  9
    Empedocles' Theories of Seeing and Breathing: The Effect of a Simile.Denis O'Brien - 1970 - Journal of Hellenic Studies 90:140-179.
  15.  1
    The Paradox of Change in Plato's Theaetetus. Part II. Intricacies of Syntax and Meaning.Denis O'Brien - 2013 - Elenchos 34 (2):259-298.
    Plato's paradox of relative change in size and number cannot be understood unless the text is emended and unless full weight is given to shifts of mood and tense and to the play of particles. The critical reader will also need to adapt to a non-Fregean concept of equality and to a definition of change different from Geach's definition of "Cambridge change''. Only so will the structure of the paradox explain young Theaetetus' bewilderment, while also showing that the author of (...)
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  16.  30
    « Immortel » Et « Impérissable » Dans le Phédon de Platon.Denis O'Brien - 2007 - International Journal of the Platonic Tradition 1 (2):109-262.
    To unravel the intricacies of the last argument of the Phaedo for the immortality of the soul, the reader has to peel away successive presuppositions, his own, Plato's and not least the presupposition that Plato very skilfully portrays as being shared by Socrates and his friends.A first presupposition is the reader's own. According to our modern ways of thinking, a soul that is immortal, if there is such a thing, is a soul that lives forever. That presupposition is not shared (...)
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  17.  14
    Plato the Pythagorean

    A Critical Study of Kenneth Sayre, Plato's Late Ontology, A Riddle Resolved.
    Denis O'Brien - 2009 - International Journal of the Platonic Tradition 3 (1):58-77.
  18.  13
    Heavy and Light in Democritus and Aristotle: Two Conceptions of Change and Identity.Denis O'Brien - 1977 - Journal of Hellenic Studies 97:64-74.
    Aristotle and Theophrastus are the two major sources for our knowledge of the atomist theory of weight.In theDe generatione et corruptioneAristotle argues that one atom may be hotter than another and that therefore the atoms cannot be impassible, since an atom which is only slightly hot could not fail to be acted upon by an atom that was very much hotter. The premiss to the argument Aristotle derives in part from a comparison with weight. It would be ridiculous, he claims, (...)
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  19.  7
    Why the Classics?Denis O'Brien - 1965 - New Blackfriars 46 (537):340-349.
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  20.  5
    Two Readings of St Augustine.Denis O'Brien - 1969 - New Blackfriars 50 (592):642-649.
  21.  4
    Ancient Philosophy, Mystery, and Magic: Empedocles and Pythagorean Tradition. Peter Kingsley.Denis O'Brien - 1998 - Isis 89 (1):122-124.
  22.  5
    Colloquium 2.Denis O'brien - 1995 - Proceedings of the Boston Area Colloquium of Ancient Philosophy 11 (1):47-86.
  23.  4
    Anaximander and Dr Dicks.Denis O'Brien - 1970 - Journal of Hellenic Studies 90:198-199.
  24.  3
    Brill Online Books and Journals.Denis O'Brien - 2000 - Phronesis 45 (1).
  25. Empedocles' "Mountain Path''.Denis O'Brien - 2012 - Elenchos 33 (2):301-334.
    Empedocles' fr. 24 is known only from its quotation by Plutarch. The words as quoted leave themselves open to divergent interpretations. The context in Plutarch nonetheless holds out some hope of being able to decide which of the divergent interpretations would have matched the use that Empedocles himself made of the two verses in his poem.
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