Signal Analysis
http://www.maa.org/taxonomy/term/41495/0
enThe Function sin(x)/x
http://www.maa.org/programs/maa-awards/writing-awards/the-function-sinxx
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><b>Award:</b> George Pólya</p>
<p><b>Year of Award:</b> 1991</p>
<p><b>Publication Information:</b> <i>The</i> <i>College Mathematics Journal</i>, Vol. 21, (1990), pp. 90-99</p>
<p><b>Summary:</b> The key roles the function plays in many areas of mathematics with some elementary examples from geometry, differential equations, and numerical analysis.</p>
<p><a title="Read the Article" href="/sites/default/files/pdf/upload_library/22/Polya/07468342.di020741.02p00026.pdf">Read the Article</a></p></div></div></div>Image Reconstruction in Linear Algebra
http://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/image-reconstruction-in-linear-algebra
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><em>The main object is to solve the inverse problem of recovering the original scene, represented by a vector or a matrix, from its photograph, represented by a product of a matrix and the original vector or matrix. The solution of the resulting matrix equation gives rise to the reconstruction of the original scene</em>.</p>
</div></div></div>Using Quadratic Forms to Correct Orientation Errors in Tracking
http://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/using-quadratic-forms-to-correct-orientation-errors-in-tracking
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><em>If noise in data transmission produces a not quite orthogonal matrix that is known to be orthogonal, how does one find the "nearest" orthogonal matrix? This capsule recasts the problem as one of maximizing a quadratic form on the four-dimensional unit sphere, and sketches a solution.</em></p>
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