Mar 5, 2011 · It's one common notation for stating that the left-hand side is defined as (in contrast to equal to) the expression on the right-hand side.

Aug 19, 2015 · The set of natural numbers {0, 1, 2, …} {0, 1, 2,} is often denoted by ω ω. There are two caveats about this notation: It is not commonly used outside of set theory, and it might …

The use of natural language is often more effective when presenting an idea. In my opinion the less often a symbol is used where a few words can go, the better. That said, there are many …

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.

A better, but less common, notation is ε ε (formatted with $\varepsilon$). You can find answers and comments related to that latter symbol ε ε in the linked posts.

Nov 3, 2014 · A dense pile of notation is very hard to read and, frankly, if you follow @AndreaL.'s suggestion and write 2|L ⇒ A = B 2 | L ⇒ A = B, most people will say, "Er, so two divides A A …

Dec 13, 2016 · An unsophisticated question from a neophyte: Given the numbers: $1,2,3,4,5$ What is the symbol for the range of the numbers? i.e. the lowest-highest number in the set. …

When I first learned linear algebra, both the professor and the book used brackets like [ and ] to enclose matrices. However, in my current differential equations textbook, matrices are …

For example, R3> 0 denotes the positive-real three-space, which would read R +, 3 in non-standard notation. Addendum: In Algebra one may come across the symbol R ∗, which refers …

In the other notation the order is inverse fxy it means the last operation you made is derivating with respect y. But : if both fxy and fyx are defined at a neighborhood of a point and are …