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.

Mar 18, 2011 · For future reference, the table of mathematical symbols at wikipedia is fairly extensive and has a number of further references.

Sep 8, 2011 · I think linear refers to the fact that vector spaces are not curved. For instance, the wikipedia page for linear spaces gets redirected to the page on vector spaces. So does the one at …

Feb 15, 2025 · In math the mean is the average. If you want the mean of a group of numbers you add them all together. Then you divide by the how many numbers there are. What do you mean by …

Apr 20, 2016 · So, $↦$ is really just the math operator/binder $λ$, in disguise. Thus, one might just as well write $ (x ↦ x^2) (3) = 3^2 = 9$, denoting the function directly rather than through a level of …

Sep 3, 2022 · Now, what exactly does undefined mean? Because I've also noticed that most mathematicians tend to use "undefined" when interpreting a value that is approaching both infinity …

In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical Operators B...

Mar 27, 2025 · The symbol "Ø" (the letter O with a vertical line through it) typically represents the concept of "empty set" in mathematics, indicating a set that contains no elements. It can also denote …

Jun 27, 2019 · What do the symbols d/dx and dy/dx mean? Ask Question Asked 12 years, 8 months ago Modified 3 years, 11 months ago

Feb 19, 2025 · What does the lambda symbol in math mean? Lambda is usually specified to mean wavelength in mathematics and physics.