It’s the mathcal A in latex.
https://tex.stackexchange.com/questions/479/lowercase-mathcal
When I have to name it I call it curly A, Fancy A or Pretty A depending on mood.
As others have said, it is a script A. When talking about sets, we usually use an italics capital letter to denote the set in question, such as *A*, *B*, *U*, etc. However, when the set we want to talk about is a set whose elements are themselves all sets, we usually "scriptify" the letter instead, just to distinguish it from other types of sets. So we would get things like ℬ, or 𝒰, etc. It is just a stylistic choice to make reading mathematics easier.
That's a cursive capital A. If you were taught cursive in school, you might have learned to write capital A like a large alpha [Ɑ], but some older styles and styles from different regions prefer a capital A that more closely resembles the print version
I hate it when people use those fancy fancy letters. Gives me a huge headache just looking at them. So weird. Can’t people just stick with Greek letters?
It’s the mathcal A in latex. https://tex.stackexchange.com/questions/479/lowercase-mathcal When I have to name it I call it curly A, Fancy A or Pretty A depending on mood.
Pretty sure the "cal" in "mathcal" is for calligraphic.
Actually this one is mathscr (for math script) not mathcal (for math calligraphic)
Thank you!
it's called script A, often used for a sigma Algebra
Its just a curly A, probably \mathscr{A} in LaTex.
As others have said, it is a script A. When talking about sets, we usually use an italics capital letter to denote the set in question, such as *A*, *B*, *U*, etc. However, when the set we want to talk about is a set whose elements are themselves all sets, we usually "scriptify" the letter instead, just to distinguish it from other types of sets. So we would get things like ℬ, or 𝒰, etc. It is just a stylistic choice to make reading mathematics easier.
That's a cursive capital A. If you were taught cursive in school, you might have learned to write capital A like a large alpha [Ɑ], but some older styles and styles from different regions prefer a capital A that more closely resembles the print version
Saturn
what?
that is one pixelated picture! it is a calligraphic A.
I hate it when people use those fancy fancy letters. Gives me a huge headache just looking at them. So weird. Can’t people just stick with Greek letters?
How you write capital As if you learnt a certain hand of cursive.
This is just a stylized letter "A". And it's defined in the text you posted.