Apr 7, 2022 · I think it makes sense then that x_bar is a commonly used notation to denote the mean of that vector because μ is already used to describe the population mean e.g. X_1...X_n Where X_i ~ N(μ, σ). edit: rereading your post again, I guess my question is: "what would be a more readable notation than x̄ is the mean of X?"

Oct 7, 2021 · It’s the usual union. Say you have three sets A_1, A_2, and A_3. Instead of writing A_1∪A_2∪A_3, you can write ∪_[i∈X]A_i, where X={1,2,3}.

Aug 8, 2023 · So in the same way, a giant union symbol with "i = 1" and "infinity" is used for the union of all those sets, a giant intersection symbol (which you'll probably see sooner or later) is the intersection of all those sets, a giant logical AND (^) would be used for the logical AND of …

According to IEC 60050, V is the symbol for the electric potential and U is the symbol for electric tension (voltage), so a potential difference. The difference is somewhat subtle, and in many cases the concepts can be used interchangeably - which is …

Educated guess: V is used for an electric potential because of Volta. U is the letter most similar to V - there are lots of times when, if V is used as a variable for a concept, then U is a variable for a similar concept. So potential energy became U, because someone might have been trying to make a connection with potential voltage.

Jul 29, 2022 · The symbol used to denote the proportionality is ‘∝‘. For example, if we say, a is proportional to b, then it is represented as “a ∝ b” and if we say, a is inversely proportional to b, then it is denoted as ‘a∝1/b’.

Nov 28, 2018 · with this in mind the symbol U has been used to help differentiate between the two. i come from a electronic engineering back ground, not 100% sure if this is the exact reason but might explain the U prefix being used

Nov 20, 2017 · “Unilateral and Unequally Disposed Profile Tolerance [ASME Y14.5-2009 Section 8.3.1.2] - To indicate that a profile of a surface tolerance is not symmetrical about the true profile, this symbol is used.

Jan 20, 2022 · Hi u/call_me_mistress99, This is an automated reminder from our moderators. Please read, and make sure your post complies with our rules. Thanks! If your post contains a problem from school, please add a comment below explaining your attempt(s) to solve it.

Mar 25, 2022 · U : Untracked changes in the file A : Newly added file D: Deleted file M : file has been moved The numbers indicate how much of each you did. So having 6 U means there's 6 new updates in this file. For the colors: Orange: when git detects the code has new changes in it. Can even be just a space! Means the changes are not tracked