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  1. notation - What does "∈" mean? - Mathematics Stack Exchange

    Jun 25, 2014 · I have started seeing the "∈" symbol in math. What exactly does it mean? I have tried googling it but google takes the symbol out of the search.

  2. logic - Is there a mathematical symbol for "if" or "when ...

    Nov 13, 2020 · To introduce a logic premise, normally people use the words "if" or "iff" (if and only if). Is there a mathematical symbol with the same meaning?

  3. Mathematical symbol for "and" - Mathematics Stack Exchange

    13 I have found some pretty complete lists (I think) of mathematical symbols here and here, but I don't see a symbol for the word "and" on either list. A person could easily just write the word …

  4. Difference between "≈", "≃", and "≅" - Mathematics Stack Exchange

    The symbol ≅ is used for isomorphism of objects of a category, and in particular for isomorphism of categories (which are objects of CAT). The symbol ≃ is used for equivalence of categories. …

  5. Math Symbol for "Where" - Mathematics Stack Exchange

    Math Symbol for "Where" Ask Question Asked 10 years, 7 months ago Modified 3 years, 3 months ago

  6. What does the math symbol - Mathematics Stack Exchange

    Aug 31, 2019 · In this case, drawing the mysterious symbol gives Either \propto or \varpropto seems to give the correct symbol. TeX often uses "var" to indicate a variation of a symbol (for …

  7. Three dot ∴ symbol meaning - Mathematics Stack Exchange

    Mar 3, 2019 · Whats the meaning of this symbol? Its a three dot symbol: ∴ I read a book, im could not find any definition of this symbol. This is about continuum property of the natural numbers …

  8. Is there any symbol for "undefined"? - Mathematics Stack Exchange

    Jan 31, 2015 · For example we have $\frac {0} {0}$ which is undefined or we have a multiplication of $2\times2$ and $3\times3$ matrices which is also undefined. Is there any symbol for …

  9. notation - Symbol for 'When ...' - Mathematics Stack Exchange

    Nov 3, 2014 · Symbol for 'When ...' Ask Question Asked 11 years, 2 months ago Modified 11 years, 2 months ago

  10. notation - What is the mathematical symbol for "nothing"?

    Jun 12, 2020 · The question is, what should be the right symbol to denote a "null value"/"nothing". I do not want to use the symbol ∅ ∅ since it represents an empty "set". I do not want to use …