[Tex/LaTex] Limit controls must follow a math operator

amsmathbabelunicode

I'm receiving "Limit controls must follow a math operator" error. Googled it, tried, nothing helped. Appears on Overleaf 2.0, using makefile in Cent OS, Fedora. Using pkgs geometry, amsmath, amsthm, amssymb, amsfonts, verbatim, babel (czech), inputenc (utf8), fontenc (IL2)

l.99 ...� $\lim\limits_{n\to\infty}$ a $\Pi\limits _{i=1}^n 2^i$...
I'm ignoring this misplaced \limits or \nolimits command.

The line looks like this:

... ${\lim_{x\to\infty}f(n)}$ ... $\Pi_{i=1}^n 2^i$ ... $\bigcup_{A\in B}A$... $\lim\limits_{n\to\infty}$ ... $\Pi\limits_{i=1}^n 2^i$ ... \verb|\limits|

EDIT1:
Found that problem starts at ${\Pi\limits_{i=1}^{n} 2^i}$ . Unfortunately, i need \limits for \sum and \Pi or anything, that forces the \Pi to have compact form (n above, i=1 under), it's school homework 🙂

Any advice appreciated. Thx

Best Answer

\Pi is a symbol not an operator, you are probably looking for \prod which is the product operator (which uses \Pi as its symbol but has a different category).

Related Solutions

[Tex/LaTex] Must be equal and other stacked math symbols

In the code below, I create a new command, \mbeq (short for "must be equal"...), which is a "math relational" operator (same type as the "ordinary" equal sign). Using the \overset command in the definition of the \mbeq operator automatically makes the new command "inherit" the type of the second argument of the \overset command; hence, it's not necessarily to assign the type "mathrel" explicitly.

\documentclass{article}
\usepackage{amsmath}
 % "mbeq": must be equal
\newcommand{\mbeq}{\overset{!}{=}}
\begin{document}
$ a\mbeq b$, $x\xrightarrow{n\to 0}\infty$
\end{document}

enter image description here

Finally, I'm not aware of a commonly used term for the "must be equal" symbol (exclamation mark set over equality symbol). I searched detexify, and no predefined symbol came up.

[Tex/LaTex] Using a math operator inside a ‘cases’ environment

does adding \displaystyle do it for you? id est:

\begin{equation}
    b_i =
    \begin{cases}
    arg \displaystyle\min_{\forall p \in B} d(a_i, p) & \text{if } d(a_i, b_i) < D_{max}
    \\
    \text{undefined} & \text{otherwise}
    \end{cases}
\end{equation}

Best Answer

Related Solutions

[Tex/LaTex] Must be equal and other stacked math symbols

[Tex/LaTex] Using a math operator inside a ‘cases’ environment

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