[Tex/LaTex] the not subset symbol

math-modesymbols

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How to look up a math symbol?

I am looking for the "not subset" symbol I see in my maths textbook. Wheres that?

In Lyx, I dont see it … Same here under relations

Best Answer

As always, Detexify is a great help here, or even the Comprehensive LaTeX Symbol List. You are looking for \not\subset:

B \not\subset A

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Related Solutions

[Tex/LaTex] the best way to obtain a “vertical” subset symbol

The graphics package also lets you rotate boxes, as explained in Section 7.2 of Lamport's LaTeX: A document preparation system. You use \rotatebox{x}{text}, where x is a specified angle in the positive (counterclockwise) direction with the "positive x-axis", which extends horizontally from the basepoint of the box that contains text.

[Tex/LaTex] How to get a double line subset symbol, (but not \Subset)

I've seen the notation used in Rudin's book “Real and complex analysis”. Perhaps, simply doubling \subset is too crude. Here's a possible solution, top line is \subset\subset, bottom line \ssubset defined with some backspace between the two.

\documentclass{article}
\newcommand{\ssubset}{\subset\joinrel\subset}

\begin{document}
$A\subset\subset B$

$A\ssubset B$
\end{document}