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  <h1>Glossar zur Linearen Algebra</h1>
  <p><a href="a.html">A</a>
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        Ausdruck
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        Definition
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        <td>  
         unit&#228;re Matrix 
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          Die komplexe (n, n) -Matrix U hei&#223;t unit&#228;r, wenn <span class="nowrap">U <sup>*</sup>U = E</span> gilt.                       
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        <td>untere Dreiecksmatrix </td>
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          Eine (m, n) -Matrix A hei&#223;t untere Dreiecksmatrix, wenn alle Elemente oberhalb             
          der Diagonalen verschwinden, d.h. <span class="nowrap">a<sub>ij</sub> = 0</span> f&#252;r alle <span class="nowrap">i &lt; j</span> .
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