## LaTeX forum ⇒ Math & Science ⇒ equation error Topic is solved

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wadoud
Posts: 11
Joined: Fri Aug 14, 2015 7:01 pm

### equation error

hi all
i have the following error:
! Extra }, or forgotten \right.

thank you
\begin{align}\Phi &= \frac{\partial V_{i}}{\partial x_{j}}  \tau_{ij}\\&= \mu \left[ 2 \left( \frac{\partial V_{x}}{\partial x}\right)^{2} +2\left( \frac{\partial V_{y}}{\partial x}\right)^{2} +2\left( \frac{ \partial V_{z}}{ \partial x}\right)^{2} +\left( \frac{ \partial V_{x}}{ \partial x} +\frac{\partial V_{x}}{\partial y}\right)^{2}\\ &+   \left(\frac{\partial V_{z}}{\partial y} +\frac{\partial V_{y}}{ \partial z}\right)^{2} + \left( \frac{\partial V_{x}}{ \partial z} +\frac{\partial V_{z}}{ \partial x}\right)^{2} \left]    + \lambda \left(\frac{ \partial V_{x}}{\partial x} +\frac{ \partial V_{y}}{\partial y} +\frac{ \partial V_{z}}{ \partial z} \right)^{2}     \label{eq:mmm}\end{align}
Last edited by Johannes_B on Sat Aug 15, 2015 8:28 pm, edited 1 time in total.
Reason: Code markup added

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Stefan Kottwitz
Site Admin
Posts: 8792
Joined: Mon Mar 10, 2008 9:44 pm
There are unmatched square brackets: \left[ and \left]. Remove them or make them to a correct \left \right pair.

Stefan
Site admin

wadoud
Posts: 11
Joined: Fri Aug 14, 2015 7:01 pm
thank you stefan

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