Advances in Sciences and Humanities

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Volume 1, Issue 3, December 2015

  • Groups of Rectangular Matrices from a Group of Square Matrices

    Christian Rakotonirina

    Issue: Volume 1, Issue 3, December 2015
    Pages: 52-54
    Received: 25 August 2015
    Accepted: 14 October 2015
    Published: 15 October 2015
    DOI: 10.11648/j.ash.20150103.11
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    Abstract: Extension of the usual matrix product has been defined in order that two any matrices have product. From a group of square matrices many groups of rectangular matrices for the extended product can be constructed. Then an example of a group of square matrices whose identity element is not the identity matrix has been given.
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  • How to Understand the Twin Paradox

    Mark Louis Ricard

    Issue: Volume 1, Issue 3, December 2015
    Pages: 55-59
    Received: 18 August 2015
    Accepted: 20 October 2015
    Published: 20 October 2015
    DOI: 10.11648/j.ash.20150103.12
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    Abstract: The twin paradox is often misunderstood, both in textbook and science popularizations. This article is intended to help clarify misconceptions involving the famous thought experiment. Of special importance is how we define the inertial frame in special theory of relativity. Another common factor that is overlooked involves the difference between ti... Show More
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