Classification of small strength-2 covering arrays

<p>The files contain strength-2 covering arrays classified in the study &quot;J. I. Kokkala, K. Meagher, R. Naserasr, K. J. Nurmela, P. R. J. &Ouml;sterg&aring;rd, B. Stevens, On the Structure of Small Strength-2 Covering Arrays&quot;.</p> <p>Each line in a file corresponds to a <span class="math-tex">\(\mathrm{CA}(N;2,k,v)\)</span>, rows of the covering array are separated by space. The file name format is <em>ca_N_2_k_v.txt</em> if all covering arrays were classified. Whenever only uniform covering arrays are classified, the file name is <em>uca_N_2_k_v.txt</em>. An additional suffix <em>_delta_&delta;</em> in the file name implies that only covering arrays with that <span class="math-tex">\(\delta\)</span> parameter (see the publication) were classified. In some cases, the number of inequivalent covering arrays was too large for the arrays to be stored; those cases are omitted here.</p>