terminology - What does 'linear' mean in Linear Algebra?
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 …
notation - What does := mean? - Mathematics Stack Exchange
Mar 18, 2011 · For future reference, the table of mathematical symbols at wikipedia is fairly extensive and has a number of further references.
What does the function f: x ↦ y mean? - Mathematics Stack …
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 …
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.
Difference between "≈", "≃", and "≅" - Mathematics Stack Exchange
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 …
What does a line on top of a number mean? - Answers
Jun 25, 2025 · A line on top of a number typically indicates a repeating decimal in mathematics. For example, (0.\\overline{3}) means that the digit 3 repeats indefinitely, representing the value …
What does the symbol O with a vertical line through it mean?
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 …
What exactly does undefined mean? - Mathematics Stack Exchange
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 …
What do the symbols d/dx and dy/dx mean? - Mathematics Stack …
May 2, 2015 · What do the symbols d/dx and dy/dx mean? Ask Question Asked 12 years, 9 months ago Modified 3 years, 11 months ago
When saying how much more does it mean add or subtract?
Feb 6, 2025 · In a math operation, when you see the words difference, how much more, or exceed these all mean you need to subtract. Okay. You would subtract because if a problem …