Latex: An ellipsis in mathematical notation

number There are many ellipsis symbols in the learning style, and the specific command symbols and usage are as follows

the ellipsis in mathematical formula

\cdots	Horizontal position with minus sign etc. high, for example $-\cdots +$, get-... +
\ddots	Diagonal ellipses, such as $a\ddots m$, get A ... M. More for matrix environments
\dots	Can be used in text mode, which is functionally identical to \ldots, but after calling the Amsmath macro package, the command in mathematical mode automatically determines the vertical position of the ellipsis, for example $a\dots M, +\dots +$, based on the operator before and after it
\hdotsfor{n}	Need to call Amsmath for the matrix environment, which can span N-column ellipses
\iddots	Objection called ellipsis, need to call Mathdots macro package, such as $a\iddots m$, get A ... M
\ldots Note (The first letter is the lowercase l, not the number 1)	Can be used in text mode, horizontal position and baseline level, such as $a\ldots m$, get A ... M
\vdots	Vertical ellipses, such as $a\vdots m$, get a:m

Latex: An ellipsis in mathematical notation