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3 results for “sum of squares”

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zenodo44/100

Approximate sum of squares decompositions for Adj₅ + k·Op₅ - λΔ₅ ∈ ISAut(F₅)

<p>This is the dataset accompanying <em>On property (T) for Aut(Fₙ) and SLₙ(</em>ℤ<em>) </em>paper (https://arxiv.org/abs/1812.03456). See the appendix thereof and Section 4 of (<a href="https://arxiv.org/abs/1712.07167">Aut(F₅) has property (T)</a>) for more details.</p> <p><strong>Content</strong></p> <ol> <li><code>1812.03456-cf6dee7.zip</code> contains a julia environment specification (<code>Project.toml</code> and <code>Manifest.toml</code>) as well as <code>1812.03456.jl</code> script used for automatic certification and jupyter noteboks in <code>./notebooks</code> directory.</li> <li><code>SAutF5_r2.tar.xz</code> contains the precomputed solutions for expressing <code>Adj₅+2&middot;Op₅-0.28&Delta;₅</code> and <code>Adj₅+3&middot;Op₅-1.4&Delta;₅</code> as sum of (hermitian) squares in the group ring of <code>SAut(F₅)</code>. The contents of this&nbsp; archive must be placed inside `<code>1812.03456`</code>directory from the <code>zip</code> file.</li> </ol> <p><strong>Preparation</strong></p> <p>The code needs to be run with <code>julia-1.4.0</code> or higher (tested versions include also versions <code>julia-1.5</code>). In principle any version in&nbsp; <code>[1.4-2.0)</code> should work due to the promise of forward compatibility.</p> <p>While located in the main directory (<code>1812.03456</code>) you should run the following code in <code>julia</code>s <code>REPL</code> console to instantiate the environment for computations:</p> <pre><code class="language-julia">using Pkg Pkg.activate(".") Pkg.instantiate()</code></pre> <p>(this needs to be done once per installation). Then the directory <code>SAutF5_r2</code> (from the <code>SAutF5_r2.tar.xz</code> archive) needs to be placed in <code>1812.03456</code>.</p> <p><strong>Replication: Jupyter notebook</strong></p> <p>A jupyter server may be launched then within the directory <code>1812.03456</code> by issuing from julia command-line (<code>REPL</code>) the following commands.</p> <pre><code>using Pkg Pkg.activate(".") using IJulia notebook(dir=".")</code></pre> <p>During the first run the user may be asked for installation of <code>Jupyter</code> program (a server for running this notebook) within <code>miniconda</code> environment, which will happen automatically after confirmation. To execute the commands in the notebook, one needs to navigate to <code>notebooks</code> subdirectory of <code>1812.03456</code> and click either of the notebooks.</p> <p>One can replicate the main computational results of the paper by executing all the cells in the <code>Positivity of Adj_n + kOp_n in ISAut(F_n)</code> notebook.</p> <p><strong>Replication: script</strong></p> <p>To verify that <em>(Adj₅ + 3.0&middot;Op₅) - 1.4&middot;&Delta;₅</em> admits an approximate sum of squares decomposition run in <code>1812.03456</code> directory</p> <blockquote> <p><code>julia --project=. --color=yes 1812.03456.jl -n 5 -k 3 -l 1.4</code></p> </blockquote> <p>On a modern laptop computer this should finish in less than 2h.</p> <p>At the end of computations you will see lines such as:</p> <blockquote> <p>┌ Info: &lambda; is certified to be &gt;<br> └&nbsp;&nbsp; &lambda;_cert.lo = 1.3701131733828074<br> [ Info: i.e Adj_5 + 3.0&middot;Op_5 - (1.3701131733828074)&middot;&Delta;_5 &isin; &Sigma;&sup2;₂ ISAut(F_5)</p> </blockquote> <p>This means that&nbsp; <em>Adj₅ + 3.0&middot;Op₅ - &lambda;&Delta;₅</em> is a sum of Hermitian squares of elements from <em>ISAut(F₅)</em> for every <code>&lambda; &lt; 1.370....</code></p> <p>A similar verification for <em>Adj₅ + 2.0&middot;Op₅ - 0.28&middot;&Delta;₅</em> can be run by executing</p> <blockquote> <p><code>julia --project=. --color=yes 1812.03456.jl -n 5 -k 2 -l 0.28</code></p> </blockquote> <p><strong>Generating the provided files</strong></p> <p>If you wish to produce the whole certificate on your own (including the generation of group ring and its multiplication table), delete all <code>*.jld</code> files from the <code>SAutF5_r2</code> folder and run one of the above commands with the same (or different) parameters again. Note: To do this you need at least 16GB of RAM and spare 24h of your CPU.</p> <p>This research was supported in part by National Science Center, Poland, grant 2017/26/D/ST1/00103.</p>

opencc-by-4.0Oct 2020View details →
zenodo32/100

Autoconfig: Balanced Minimum sum-of-squares clustering case

<p>Autoconfig: Balanced Minimum Sum-of-Squares Clustering</p> <p>See https://github.com/rmartinsanta/ac-BMSSC for full details.</p> <p>&nbsp;</p> <p>Authors of the original paper:&nbsp;<br>Alberto (Herr&aacute;n Gonz&aacute;lez)<br>Jos&eacute; Manuel (Colmenar Verdugo)<br>Abraham (Duarte Mu&ntilde;oz)</p>

opencc-by-4.0Feb 2024View details →
geo20/100

SWISS MADE: Standardized WithIn class Sum of Squares to evaluate Methodologies And Dataset Elements

GEO Series GSE20234. Homo sapiens. 8 samples. Type: Expression profiling by array.

openGEO-OpenMar 2010View details →

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