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  2. Pure Theory of Law - Wikipedia

    en.wikipedia.org/wiki/Pure_Theory_of_Law

    Already in 1913, Kelsen had identified the need for a legal theoretic framework to support the idea of the Rechtsstaat. [5]Adolf Julius Merkl [de; pt] was a student of Kelsen's who made important contributions starting in 1918 in the area of hierarchy of norms that would help underpin some of Kelsen's ideas on norms and how they fit into his pure theory of law.

  3. Basic norm - Wikipedia

    en.wikipedia.org/wiki/Basic_norm

    'Basic norm ' (German: Grundnorm) is a concept in the Pure Theory of Law created by Hans Kelsen, a jurist and legal philosopher. Kelsen used this word to denote the basic norm, order, or rule that forms an underlying basis for a legal system.

  4. Hans Kelsen - Wikipedia

    en.wikipedia.org/wiki/Hans_Kelsen

    Hans Kelsen (/ ˈ k ɛ l s ən /; German: [ˈhans ˈkɛlsən]; October 11, 1881 – April 19, 1973) was an Austrian jurist, legal philosopher and political philosopher.He was the principal architect of the 1920 Austrian Constitution, which with amendments is still in operation.

  5. List of unsolved problems in biology - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Developmental psychobiology posed this question since the lack of knowledge about the precise coordination of all cells, even those not related anatomically, in space and time during the embryonic period does not allow us to understand what forces at the cellular level coordinate four very general classes of tissue deformation, namely: tissue ...

  6. School of Sciences, UNAM - Wikipedia

    en.wikipedia.org/wiki/School_of_Sciences,_UNAM

    The history of this faculty is rather different from that of other schools that have their origins in former national schools. The study plan for this faculty was initially given in the Philosophy Faculty of the UNAM. The Biology major was the first one to have a structured study plan, originating around 1930. [3]

  7. Legal positivism - Wikipedia

    en.wikipedia.org/wiki/Legal_positivism

    In Kelsen's view, the validity of a legal norm derives from a higher norm, creating a hierarchy that ultimately rests on a "basic norm": this basic norm, not the sovereign, is the ultimate source of legal authority. In addition to Kelsen, other prominent legal positivists of the 20th century include H. L. A. Hart and Joseph Raz.

  8. National Autonomous University of Mexico - Wikipedia

    en.wikipedia.org/wiki/National_Autonomous...

    The National Autonomous University of Mexico (Spanish: Universidad Nacional Autónoma de México, UNAM), is a public research university in Mexico. It has several campuses in Mexico City, and many others in various locations across Mexico, as well as a presence in nine countries.

  9. Human biology - Wikipedia

    en.wikipedia.org/wiki/Human_biology

    Human biology is an interdisciplinary area of academic study that examines humans through the influences and interplay of many diverse fields such as genetics, evolution, physiology, anatomy, epidemiology, anthropology, ecology, nutrition, population genetics, and sociocultural influences.