# Questions tagged [notation]

Question on the meaning, history, and usage of mathematical symbols and notation. Please remember to mention where (book, paper, webpage, etc.) you encountered any mathematical notation you are asking about.

8,456 questions
2answers
46 views

### A contradiction arising due to set-builder form.

I have noticed a kind of contradiction arising due to set-builder form involving universal set$(U)$ while I was performing operations on set theory. Here it is - Let us consider an arbitrary non-...
0answers
27 views

### What are the correct mathematical expressions for these headers?

Table Z is the function which adds a and b (just a simple example). Column D shows the increase from the last value in absolute value and Column E in percentage. I would use Delta(Star)Z and Delta%Z ...
2answers
58 views

### What is the difference between a definition and an equivalence class?

In what way is 'the definition of $x$ is $y$' ($x:=y$) not the same as '$x$ is equivalent to $y$' ($x=y$)? I can find no justification for making the distinction aside from 'it feels right'. It seems ...
0answers
34 views

2answers
30 views

### Summation Notations - (Discrete Math) I'm having trouble

I've been working on a single sigma notation problem for about 40 minutes now, and I'm having trouble conceptualizing the solution to this problem. I look at examples, and it seems that I begin to ...