※ 引述《carex ()》之銘言：
: I am having trouble doing something like thes
: \begin{eqnarray}
: \left.{[\hat{\mathbf{H}}]_{i,j}=\frac{\partial^2
: v_B(\mathbf{\Theta})}{\partial \theta_i \partial
: \theta_j}}\right|_{\mathbf{\Theta}=\hat{\mathbf{\Theta}}_B}
: \end{eqnarray}
: but the | is not long enough. Is there anyone who knows how to draw
: this kind of vertical line? All suggestions are highly appreciated.
我沒辦法用推文表達 ^^
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◆ From: 59.121.149.159
※ 編輯: cloudxyz 來自: 59.121.149.159 (01/27 15:54)
※ 編輯: cloudxyz 來自: 59.121.149.159 (01/27 15:55)