elementary set theory - What does the letter U mean in math ...
What does the letter U mean in the following expression: $$ \bigcup_ {\alpha} A_\alpha \;? $$ It doesn't look like logical OR. Link to original screen shot.
What does $\|u\|$ mean? - Mathematics Stack Exchange
Oct 20, 2019 · What does $\\left\\Vert \\mathbf{u}\\right\\Vert$ mean in this equation? How would this equation be performed? I'm extremely terrible in discrete mathematics and a simplistic …
What does the symbol described below mean? (looks like: sideway …
Apr 22, 2014 · The symbol kind of looks like this: ε, but it's more like a sideways u with a line through the middle.
What does the notation U* mean? - Mathematics Stack Exchange
Sep 18, 2012 · In relation to set theory and given a set U, what does U* mean? I'm working on homework for a programming language theory class (section on types) and one of the …
What does the u (t) mean within sign in signals?
May 31, 2023 · I understand that within signals and math, u (t) is used to represent the unit step function. What I am confused about is the notation and the meaning behind the way that some …
What does P (A U B) mean, in terms of real values?
What does P (A U B) mean, in terms of real values? Ask Question Asked 11 years, 8 months ago Modified 8 years ago
What do $\bigcup_ {n=1}^\infty S_n$ and $\bigcap_ {n=1}^\infty …
The equation where you've enclosed the first part in red is the definition of the $\bigcup_ {n=1}^ {\infty} S_n$ notation. It works just like sum notation does: $$ \sum_ {n=a}^ {b} f (n) \quad\text …
notation - What does "∈" mean? - Mathematics Stack Exchange
Jun 25, 2014 · I have started seeing the "∈" symbol in math. What exactly does it mean? I have tried googling it but google takes the symbol out of the search.
What does $U_i$ mean in $U_iA_i \\in \\mathcal{F}$
Jan 17, 2020 · I am a fourth-year math student, so I understand that $\\cup$ means union of sets. However, I got stuck reading Probability: Theory and Examples by Durrett. Considering that I …
What does $u_ {xx}$ and $u_ {tt}$ mean? - Mathematics Stack …
5 subscript is a derivative with respect to this variable. $$ u_ {xx} = \frac {\partial^2u} {\partial x \partial x} $$ Share Cite answered Nov 23, 2015 at 16:08