<div style="padding:40px;color:#cbccc6"><h1>反演变换</h1><p>网格在反演下变弧线。</p><div style="padding:20px;background:#0d1017;border-left:3px solid #ffb454"><span class="katex-error" title="ParseError: KaTeX parse error: Unexpected character: '\' at position 8: P\\to P\̲" style="color:#cc0000">P\\to P\</span></div><p style="color:#707a8c">该页面需要 JavaScript 进行交互式可视化。</p></div>