AMS-LaTeX
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AMS-LaTeX is a collection of LaTeX document classes and packages developed for the American Mathematical Society (AMS). Its additions to LaTeX include the typesetting of multi-line and other mathematical statements, document classes, and fonts containing numerous mathematical symbols.
It has largely superseded the plain TeX macro package AMS-TeX. AMS-TeX was originally written by Michael Spivak, and was used by the AMS from 1983 to 1985.
MathJax supports AMS-LaTeX through extensions.
The following code of the LaTeX2e produces the AMS-LaTeX logo:
The package has a suite of facilities to format multi-line equations. For example, the following code,
causes the equals signs in the two lines to be aligned with one another, like this:
y = ( x + 1 ) 2 = x 2 + 2 x + 1 {\displaystyle {\begin{aligned}y&=(x+1)^{2}\\&=x^{2}+2x+1\end{aligned}}}
AMS-LaTeX also includes many flexible commands for formatting and numbering theorems, lemmas, etc. For example, one may use the environment theorem
to generate
Theorem (Pythagoras) Suppose a ≤ b ≤ c {\displaystyle a\leq b\leq c} are the side-lengths of a right triangle. Then a 2 + b 2 = c 2 {\displaystyle a^{2}+b^{2}=c^{2}}. Proof. . . □