latex公式倒三角

LaTeX中表示倒三角的符号是`\nabla`。`\nabla`是一个数学符号，表示梯度算子，也被称为“del”或“nabla”算子。它在向量分析和微分方程中经常使用。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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