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مؤلف: John Reyn

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1 كتب إلكترونية بواسطة John Reyn

John Reyn: Phase Portraits of Planar Quadratic Systems
Although some examples of phase portraits of quadratic systems can already be found in the work of Poincaré, the first paper dealing exclusively with these systems was published by Büchel in 1904. By …
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