# Latex infinity symbol

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Of course LaTeX can print both symbols: If \propto is used as symbol for infinity, then it needs a set of curly braces to get rid of the \mathrel.

Selected LaTeX commands for math symbols and special typographic characters . Symbols (math mode). Symbol, Command, Comment. prime, \prime. infinity.

List of LaTeX mathematical symbols All the predefined mathematical symbols from the TeX package are listed below. \infty, infinity.

Home Questions Tags Users Unanswered. Other answers made an infinity symbol with a notch cut out with a white mark. Login Register Active topics. Topics Active topics Unanswered topics News and Articles. Heiko Oberdiek k 16

## math operators - Redefining Infinity in LaTeX - TeX - LaTeX Stack Exchange

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Infinity is defined as something that is uncountable. But every where I see the symbol of Infinity as a closed loop. My professor said, that it symbolizes that the boundary of Infinity is determined but it isn't so. I too agree with him. The Infinity symbol must be open curve rather than closed, something like this: I would like to define and use this symbol for Infinity.

How do I achieve it? It is not a good idea to replace the well-established symbol for infinity, which even many non-mathematicians will understand, by a different symbol, a relational operator, which is used for a complete different purpose. This is called obfuscating and will irritate the user at best. The example also shows different input methods for the symbols:.

You can create your own copy of used math font and you can do changes here by fontforge program, for example. This example does the black rule over the infinity char in the appropriate place.

Now, it is your exercise to do this rule not black but white. It is more complicated to do this working in scriptstyle and scripscriptstyle too. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies.

Home Questions Tags Users Unanswered. I can't agree with your professor's opinion. This symbol doesn't denote infinity when referred to sets, but just a mathematical concept used in analysis.

If you want to be understood by other mathematicians, use established symbols. Or do you also write ": Adding infinity gives a one-point compactification of the real numbers, which the closed shape nicely suggests. I agree with egreg and not with your professor.

It is just a symbol used traditionally. I like that you're trying to capture intuition by changing notation, but this seems too specific to a certain interpretation.

Also, you shouldn't expect to capture a symbol's meaning so specifically by how it's written. But on that route, why not take issue with it having an intersection point?

I think it's worth living with some counterintuitive notation for the sake of universal communication. Both symbols are available in Unicode: Of course LaTeX can print both symbols: The example also shows different input methods for the symbols: Heiko Oberdiek k 16 It already means proportional to.