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<p>basic operators are <a href="page.php?w=linear_map">linear map</a>s, which act on <a href="page.php?w=vector_space">vector space</a>s. Linear operators refer to linear maps whose domain and range are the same space, for example from  to .Such operators often preserve properties, such as <a href="page.php?w=continuous_function">continuity</a>. For example, <a href="page.php?w=differentiation_%28mathematics%29">differentiation</a> and <a href="page.php?w=indefinite_integration">indefinite integration</a> are linear operators; operators that are</p><p>
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