[Tex/LaTex] Missing brackets on equations

bracketserrorssharelatex

I'm writing a couple of equations in LaTex (it's my first time using it) and, although I'm finding the general usage pretty straight forward I keep getting a missing brackets warning from ShareLatex that I can't fix, it doesn't tell me where it's missing just the line in which it is missing. Could anyone help me figure out where's the missing bracket in these?

Eq.1

\left\lfloor\frac{n}{\log_2 (n/2)}+n^\left(\frac{1}{6}\right)\right\rfloor \leq \Omega(n\wr) \leq \left\lfloor\frac{n}{\log_2(n/2}+n^\left(\frac{1}{2}\right)\right\rfloor

Eq.2

\begin{align*}
T_{prod}F(n\wr)&\simeq\beta n\log\log(n)\sum_{1\leq i\leq \lfloor lg\hspace{2pt}n\rfloor} \log\left(\alpha n2^\left(-i\right)\right)\\
&\simeq \frac{\alpha}{\beta}n(\log n)^2 \log\log n \\
\end{align*}

Best Answer

You forgot to put some of your exponents between brackets, so that ^ is followed by \left(. I took the opportunity to slighly improve your formula with the \mathclap command from mathtools.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{mathtools}

\begin{document}

\[ \left\lfloor\frac{n}{\log_2 (n/2)}+n^{\left(\frac{1}{6}\right)}\right\rfloor \leq \Omega(n\wr) \leq
\left\lfloor\frac{n}{\log_2(n/2)}+n^{\left(\frac{1}{2}\right)}\right\rfloor
 \]

\begin{align*}
T_\text{prod}F(n\wr)&\simeq\beta n\log\log(n)\sum_{\mathclap{1\leq i\leq \lfloor lg\:n\rfloor}} \log\left(\alpha n2^{\left(-i\right)}\right)\\
&\simeq \frac{\alpha}{\beta}n(\log n)^2 \log\log n \\
\end{align*}

\end{document}

Related Solutions

[Tex/LaTex] Missing final brackets (in one equation { and in other – ]) in the equations

You can't use \left in one line of a split and \right in another one. You should also use an align* environment (and don't use redundant \left and \right); the big delimiters must be set by hand.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
F'&=\delta m\biggl\{f\frac{M_1l}{r^3}\bigl[3\cos^2\phi\cos^2(\lambda-D)-1\bigr]
    +f\frac{M_2l}{R^3_1}(3\cos^2\phi\cos^2\lambda-1)-{} \\
  &\qquad{}-\frac{1}{2}f\frac{M_2r_1}{R^3_1}\cos\phi\cos(\lambda-D)(1+3\cos2D)
   -\frac{3}{2}f\frac{M_2r_1}{R^3_1}\cos\phi\sin(\lambda-D)\sin2D\biggr\} \\[2ex]
F^n&=\delta m\biggl\{-\frac{3}{2}f\frac{M_1l}{r^3}\sin 2\phi\cos^2(\lambda-D)
    -\frac{3}{2}f\frac{M_2l}{R^3_1}\sin 2\phi\cos^2\lambda-{} \\
   &\qquad{}-\frac{1}{2}f\frac{M_2r_1}{R^3_1}\sin\phi\bigl[3\sin(\lambda-D)\sin2D-
    \cos(\lambda-D)(1_3\cos 2D)\bigl]\biggl\} \\[2ex]
F^m&=\sigma m\biggl[-\frac{3}{2}f\frac{M_1l}{r^3}\cos\phi\sin 2(\lambda-D)
    -\frac{3}{2}f\frac{M_2l}{R^3_1}\cos\phi\sin 2\lambda+{} \\
   &\qquad{}+\frac{1}{2}f\frac{M_2}{R^3_1}r_1\sin(\lambda-D)(1+3\cos 2D)
    +\frac{3}{2}f\frac{M_2}{R^3_1}r_1\cos(\lambda-D)\sin 2D\biggr]
\end{align*}
\end{document}

enter image description here

First of all I did an align*, so the three equals sign can be aligned to each other. It's not good to stack \[...\] formulas.
I removed all the inner \left and \right that do nothing except adding unwanted spaces. However, I increased the size of a [...] pair to make clearer their correspondence (it's in the second equation; there's no need for doing this in the first formula)
In order to make clear that each second line is a continuation, I added a \qquad of space to push it to the right of the alignment point.
Before or after the "isolated" minus or plus signs, I put {} in order to get correct spacing, otherwise they would not work as binary operation because of how TeX determines the difference between $-1$ and $2-1$ .
Most important, I set by hand the size of the main delimiters, because so you have full control over them even if they are in different lines.

As a side note, I wouldn't repeat the operation sign at the break point; it's a bad habit of Russian typography, that's not used much in Western countries. I find it distracting and ambiguous: in the first equation is it "minus minus" that makes "plus"? It isn't, I know, but why repeating it? The reader finds the break, goes on the next line where it's clear that the formula continues.

[Tex/LaTex] Bold brackets in equations

You can do

enter image description here

\documentclass{article}
\usepackage{bm}
\showoutput
\begin{document}

$[ \vec{\nabla} \times \vec{v} ]$

$\bm{[} \vec{\nabla} \times \vec{v} \bm{]}$

\end{document}

It does not work with \left, \right with the default cm fonts as there is no bold extension font (for large brackets) in that font set. However extended brackets are not needed here.

Best Answer

Related Solutions

[Tex/LaTex] Missing final brackets (in one equation { and in other – ]) in the equations

[Tex/LaTex] Bold brackets in equations

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