amsmath
I am new to latex. I need to write the following equation in latex.
I have tried following packages:-
\usepackage{amssymb}
\usepackage{amsmath}
L1 \cap Li \neq \Phi
But i constantly get error and non of the symbols gets displayed. what am i doing wrong. (i am using XeLatex as there are both English and urdu Fonts in my article)
This is my suggestion:
\documentclass{article}
\usepackage{amsmath}
\usepackage{siunitx}
\begin{document}
\begin{equation*}
P_{\text{AVG}} = \SI{19.5}{\micro\watt} + \frac{\SI{2180}{\micro\joule}}{5 \cdot \SI{60}{\second} + \SI{0.2}{\second}} = \SI{26.77}{\micro\watt}
\end{equation*}
\end{document}
(By loading the amsmath package, I can use text to typeset the "AVG" subscript in roman)
You could use equation and \begin{aligned}[b] (as @Mico kindly suggested), this is under the assumption you want only a single number for the equation. With the [b] option the eqn number is printed on the bottom line
\documentclass{article}
\usepackage{amsmath,mathtools}
\begin{document}
\begin{equation}
\begin{aligned}[b]
\beta_{ij}^{js-js}\mid z_{ij} &=
\Biggl(1 -\Biggl(\frac{n -2}{\lVert \boldsymbol{z_j} \rVert^2 - \frac{2(n-2)\sum_iz_{ij}^2}{\lVert \boldsymbol{z_{i}}\rVert^2}+\frac{(n-2)^2\sum_iZ_{ij}^2}{\lVert \boldsymbol{z_i}\rVert^4} } +
\frac{\mathrm{p}-2}{\lVert \boldsymbol{z_{i}} \rVert^2} \\
&\qquad-\frac{(n -2)(\mathrm{p}-2)}{\lVert \boldsymbol{z_{i}} \rVert^2 \Bigl(\lVert \boldsymbol{z_j}\rVert^2 -\frac{2(n-2)\sum_iz_{ij}^2}{\lVert \boldsymbol{z_{i}}\rVert^2}+\frac{(n-2)^2\sum_iZ_{ij}^2}{\lVert \boldsymbol{z_i}\rVert^4}\Bigr)} \Biggr) \Biggr) z_{ij}
\\
&=\biggl(1 -\biggl(\frac{n -2}{\lVert \boldsymbol{z_j}\rVert^2-k_j} +\frac{\text{p}-2}{\lVert \boldsymbol{z_{i}} \rVert^2} - \frac{(n -2)(\mathrm{p}-2)}{\lVert \boldsymbol{z_{i}} \rVert^2 (\lVert \boldsymbol{z_j}\rVert^2-k_j)} \biggr)\biggr) z_{ij}
\end{aligned}
\end{equation}
\end{document}
giving
What I did, except using the aforementioned environment is:
aligned the second row with a \qquad space, in order to give it an "indent", which is what I think you wanted
Got rid of left and right which were abused (it's best to manually scale the parentheses with commands such as bigl–bigr and so on, to have better spacing and scaling). you could tweak it if you want
I replaced text with mathrm (text gives the current font)
Best Answer
It works for me if I complete your code to create a minimal example:
Admittedly, this isn't yet quite right because it does not look quite like the target set of symbols.
To obtain a subscript in a mathematical expression, just use
L_{<subscript>}. To obtain the lowercase Greek letter, use\phirather than\Phi.EDIT
In light of Heiko Oberdiek's comment, for the final symbol, I'm not entirely clear which one you want but I suspect that Heiko may be right. In any case, here's a selection to choose from: