Symbols:General

Negation

 * $\not=, \not>, \not<, \not \ge, \not \le, \not \in, \not \exists, \not \subseteq, \not \subset, \not \supseteq, \not \supset$

The above symbols all mean the opposite of the non struck through version of the symbol.

For example, $x \not\in S$ means that $x$ is not an element of $S$.

The slash $/$ through a symbol can be used to reverse the meaning of essentially any mathematical symbol (especially relations), although it is used most frequently with those listed above.


 * Note: Using $/$ with  and   can be confusing:
 * $\not \subsetneq, \not \supsetneq$
 * as the strike through of the symbol as a whole obscures the clarity of the strike through of the equivalence bar on the bottom, and hence should be avoided.


 * The constructs  and   can be used instead, but these are unwieldy and look suboptimal:
 * $\not \subsetneqq, \not \supsetneqq$
 * and it is suggested that a statement that requires this concept be restructured so as to avoid such a construct.

The $\LaTeX$ code for negation is  followed by the code for whatever symbol you want to negate.

For example,  will render $\not \in$.

Note that several of the above relations also have their own $\LaTeX$ commands for their negations, for example  or   for , and   for.

See Arithmetic and Algebra and Set Operations and Relations for the definitions of the symbols above.

Prime

 * $x'$

The symbol $'$ is a general indicator of another version of or another type of where the specific version or type that is being described is to be defined.

The symbol $x'$ should technically be voiced x prime, although colloquially referred to as some variant of x dash or x tick or whatever can be devised by the ingenuity of the reader.