https://elated-raman-42e0c2.netlify.app/tags/numberic/Recent content in Numberic on Sawyer Zheng's BlogHugozh-cnThu, 07 Jul 2022 22:39:00 +0800https://elated-raman-42e0c2.netlify.app/post/notes/python/numerical_computing/Wed, 29 Jun 2022 00:00:00 +0000https://elated-raman-42e0c2.netlify.app/post/notes/python/numerical_computing/<div id="outline-container-headline-1" class="outline-2"> <h2 id="headline-1"> 最大公约数 greatest common divisor number </h2> <div id="outline-text-headline-1" class="outline-text-2"> <ul> <li>math.gcd()</li> <li>sympy.gcd</li> <li>numpy.gcd</li> </ul> <p>实现方法参考：</p> <ul> <li><a href="https://www.geeksforgeeks.org/gcd-in-python/">gcd() in Python - GeeksforGeeks</a></li> </ul> </div> </div> <div id="outline-container-headline-2" class="outline-2"> <h2 id="headline-2"> 最大公倍数 </h2> <div id="outline-text-headline-2" class="outline-text-2"> <ul> <li>least common denominator</li> <li>lowest common multiple</li> </ul> <p>工具：</p> <ul> <li>numpy.lcm</li> <li>sympy.lcm</li> </ul> <p>简单实现：</p> <div class="src src-python"> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="kn">import</span> <span class="nn">math</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">get_lcm</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">):</span> </span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="n">x</span> <span class="o">*</span> <span class="n">y</span> <span class="o">/</span> <span class="n">math</span><span class="o">.</span><span class="n">gcd</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span></span></span></code></pre></td></tr></table> </div> </div> </div> </div> </div> <div id="outline-container-headline-3" class="outline-2"> <h2 id="headline-3"> 解线性方程组 </h2> <div id="outline-text-headline-3" class="outline-text-2"> <div id="outline-container-headline-4" class="outline-3"> <h3 id="headline-4"> nullspace 方法 </h3> <div id="outline-text-headline-4" class="outline-text-3"> <p>使用限制： 适合无常亮参数的线性方程组</p>