texlive[57286] Master/texmf-dist/doc/latex/undergradmath:

commits+karl at tug.org commits+karl at tug.org
Fri Jan 1 22:48:02 CET 2021


Revision: 57286
          http://tug.org/svn/texlive?view=revision&revision=57286
Author:   karl
Date:     2021-01-01 22:48:02 +0100 (Fri, 01 Jan 2021)
Log Message:
-----------
undergradmath (1jan21)

Modified Paths:
--------------
    trunk/Master/texmf-dist/doc/latex/undergradmath/LICENSE
    trunk/Master/texmf-dist/doc/latex/undergradmath/README
    trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.pdf
    trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.tex
    trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath_0.png
    trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath_1.png

Modified: trunk/Master/texmf-dist/doc/latex/undergradmath/LICENSE
===================================================================
--- trunk/Master/texmf-dist/doc/latex/undergradmath/LICENSE	2021-01-01 21:47:48 UTC (rev 57285)
+++ trunk/Master/texmf-dist/doc/latex/undergradmath/LICENSE	2021-01-01 21:48:02 UTC (rev 57286)
@@ -1,7 +1,7 @@
 LICENSE file for LaTeX Math for Undergraduates
 
 Jim Hefferon
-2017-Jan-09
+2020-Dec-30
 
 This material is Free.  The license is Creative Commons 
 Attribution-ShareAlike 4.0 International, CC BY-SA.
\ No newline at end of file

Modified: trunk/Master/texmf-dist/doc/latex/undergradmath/README
===================================================================
--- trunk/Master/texmf-dist/doc/latex/undergradmath/README	2021-01-01 21:47:48 UTC (rev 57285)
+++ trunk/Master/texmf-dist/doc/latex/undergradmath/README	2021-01-01 21:48:02 UTC (rev 57286)
@@ -1,21 +1,27 @@
 README file for LaTeX Math for Undergraduates
 
 Jim Hefferon
-2017-Jan-10
 
-This is a cheat sheet for writing mathematics with LaTeX focused on the
+This is a cheat sheet for writing mathematics with LaTeX, focused on the
 needs of US undergraduates.
 
 When I asked my students for feedback on LaTeX the consensus was that
-it was pretty straightforward but that they needed a list of symbols.  
-This is my response.
+it was pretty straightforward but that they needed a few things,
+such as a list of symbols.  This is that list.
 
 
+HISTORY
+
+2017-Jan-10 Initial.
+2020-Dec-30 Put into repo and correct a few things.  These include
+  $ and $ instead of \( and \), mention RSFS, change to mathtools
+  from amsmath, improve discussion of spacing in math, and put
+  \big, etc., first in discussion of fence sizing.
+
 FEEDBACK
 
-I would appreciate any corrections.  Note though that a document like
-this requires that things are boiled down so I have deliberately kept
-out packages other than the AMS ones, and in some places I have made
-choices such as using an italic d in the integral.  The beauty of
-providing the source is that if your choices differ then you can just
-make your own tweaks.
+I appreciate corrections. However, this document requires that things
+are boiled down, so in some places I have made choices such as using an
+italic d in the integral.  If your choices differ then you can grab
+the source at https://gitlab.com/jim.hefferon/undergradmath and adapt it
+for your needs.

Modified: trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.pdf
===================================================================
(Binary files differ)

Modified: trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.tex
===================================================================
--- trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.tex	2021-01-01 21:47:48 UTC (rev 57285)
+++ trunk/Master/texmf-dist/doc/latex/undergradmath/undergradmath.tex	2021-01-01 21:48:02 UTC (rev 57286)
@@ -1,6 +1,7 @@
 \RequirePackage{mmap}  % make PDF copy and paste-able
 \documentclass[twocolumn]{article}
 \usepackage{amsmath, amsthm, amssymb}
+\usepackage{mathrsfs}
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 % \usepackage{lmodern} % from http://tex.stackexchange.com/a/115089/121234
@@ -23,7 +24,7 @@
 \lstdefinestyle{inline}{basicstyle=\ttfamily}
 
 \usepackage[dvipsnames]{xcolor}
-  \definecolor{headcolor}{HTML}{E34234}  % vermillion
+  \definecolor{headcolor}{HTML}{004225} % British racing green {E34234}  % vermillion
 \usepackage{titlesec}
 % \titleformat{ command }[ shape ]{ format }{ label }{ sep }{ before-code }[ after-code ]
 % \titlespacing*{ command }{ left }{ before-sep }{ after-sep }[ right-sep ]
@@ -42,16 +43,15 @@
 
 \section{Rule One}
 Any mathematics at all, 
-even a single character, goes in a mathematical setting.
-Thus, for ``the value of \( x \) is \( 7 \)\,'' enter
-`\lstinline[style=inline]!the value of \( x \) is \( 7 \)!'.
+even a single character, gets a mathematical setting.
+Thus, for ``the value of $x$ is $7$\,'' enter
+\lstinline[style=inline]!the value of $x$ is $7$!.
 
 \section{Template}
 Your document should contain at least this.
 \begin{lstlisting}
 \documentclass{article}
-\usepackage{amsmath, amssymb, amsthm}
-\usepackage[utf8]{inputenc}
+\usepackage{mathtools,amssymb,amsthm} % imports amsmath
 
 \begin{document}
   --document body here--
@@ -62,19 +62,19 @@
 \section{Common constructs}
 \begin{center}
   \begin{tabular}{@{} *{1}{l@{\hspace{1.5em}}} l @{}}
-    \(x^2\)\quad\lstinline[style=inline]!x^2!
-      &\(\sqrt{2}\), \(\sqrt[n]{3}\)\quad\lstinline[style=inline]!\sqrt{2}!,
+    $x^2$\quad\lstinline[style=inline]!x^2!
+      &$\sqrt{2}$, $\sqrt[n]{3}$\quad\lstinline[style=inline]!\sqrt{2}!,
         \lstinline[style=inline]!\sqrt[n]{3}!                           \\     
-    \(x_{i,j}\)\quad\lstinline[style=inline]!x_{i,j}!
-      &\(\frac{2}{3}\), \(2/3\)\quad\lstinline[style=inline]!\frac{2}{3}!,
+    $x_{i,j}$\quad\lstinline[style=inline]!x_{i,j}!
+      &$\frac{2}{3}$, $2/3$\quad\lstinline[style=inline]!\frac{2}{3}!,
       \lstinline[style=inline]!2/3!                                     
   \end{tabular}
 \end{center}
 
 \section{Calligraphic letters}
-Use as \lstinline[style=inline]!\( \mathcal{A} \)!.
+Use as in \lstinline[style=inline]!$\mathcal{A}$!.
 \begin{center}
-    \( \mathcal{A}\mathcal{B}\mathcal{C} 
+    $ \mathcal{A}\mathcal{B}\mathcal{C} 
        \mathcal{D}\mathcal{E}\mathcal{F} 
        \mathcal{G}\mathcal{H}\mathcal{I} 
        \mathcal{J}\mathcal{K}\mathcal{L} 
@@ -82,10 +82,14 @@
        \mathcal{P}\mathcal{Q}\mathcal{R} 
        \mathcal{S}\mathcal{T}\mathcal{U} 
        \mathcal{V}\mathcal{W}\mathcal{X} 
-       \mathcal{Y}\mathcal{Z}  \)
+       \mathcal{Y}\mathcal{Z}  $
 \end{center}
+Get script letters, such as $\mathscr{P}$
+from \lstinline[style=inline]!$\mathscr{P}$!, 
+by putting 
+\lstinline[style=inline]!\usepackage{mathrsfs}!
+in the preamble.
 
-
 \section{Greek}
 \begin{center}
   \begin{tabular}{@{}l@{\hspace{1em}}l@{}}
@@ -137,19 +141,19 @@
 \begin{center} 
   \begin{tabular}{@{}*{2}{l@{\hspace{1em}}}l@{}}
     $\cup$\quad \lstinline[style=inline]!\cup!
-      &\(\mathbb{R}\)\quad\lstinline[style=inline]!\mathbb{R}!  
+      &$\mathbb{R}$\quad\lstinline[style=inline]!\mathbb{R}!  
       &$\forall$\quad \lstinline[style=inline]!\forall!        \\
     $\cap$\quad \lstinline[style=inline]!\cap!
-      &\(\mathbb{Z}\)\quad\lstinline[style=inline]!\mathbb{Z}!  
+      &$\mathbb{Z}$\quad\lstinline[style=inline]!\mathbb{Z}!  
       &$\exists$\quad \lstinline[style=inline]!\exists!         \\  
-    \(\subset\)\quad\lstinline[style=inline]!\subset!  
-      &\(\mathbb{Q}\)\quad\lstinline[style=inline]!\mathbb{Q}!  
+    $\subset$\quad\lstinline[style=inline]!\subset!  
+      &$\mathbb{Q}$\quad\lstinline[style=inline]!\mathbb{Q}!  
       &$\neg$\quad \lstinline[style=inline]!\neg!                \\
     $\subseteq$\quad \lstinline[style=inline]!\subseteq!     
-      &\(\mathbb{N}\)\quad\lstinline[style=inline]!\mathbb{N}!  
+      &$\mathbb{N}$\quad\lstinline[style=inline]!\mathbb{N}!  
       &$\vee$\quad \lstinline[style=inline]!\vee!               \\
     $\supset$\quad \lstinline[style=inline]!\supset!       
-      &\(\mathbb{C}\)\quad\lstinline[style=inline]!\mathbb{C}!  
+      &$\mathbb{C}$\quad\lstinline[style=inline]!\mathbb{C}!  
       &$\wedge$\quad \lstinline[style=inline]!\wedge!           \\     
     $\supseteq$\quad \lstinline[style=inline]!\supseteq!     
       &$\varnothing$\quad \lstinline[style=inline]!\varnothing!       
@@ -157,24 +161,18 @@
     $\in$\quad \lstinline[style=inline]!\in!            
       &$\emptyset$\quad \lstinline[style=inline]!\emptyset!  
       &$\models$\quad \lstinline[style=inline]!\models!          \\
-    $\ni$\quad \lstinline[style=inline]!\ni!     
+    $\notin$\quad \lstinline[style=inline]!\notin!             
       &$\aleph$\quad \lstinline[style=inline]!\aleph!  
-      &$\Rightarrow$\quad \lstinline[style=inline]!\Rightarrow!   \\    
-    $\notin$\quad \lstinline[style=inline]!\notin!     
-      &$\setminus$\quad \lstinline[style=inline]!\setminus!        
-      &$\nRightarrow$\quad \lstinline[style=inline]!\nRightarrow!    \\  
-    $\not\in$\quad \lstinline[style=inline]!\not\in!     
-      &$\equiv$\quad \lstinline[style=inline]!\equiv!     
-      &  \\     
+      &$\setminus$\quad \lstinline[style=inline]!\setminus!      \\    
+    % $\ni$\quad \lstinline[style=inline]!\ni!     
   \end{tabular}
 \end{center}
-Negate an operator, as in \(\not\subset\), 
+Negate an operator, as in $\not\subset$, 
 with \lstinline[style=inline]!\not\subset!.
 Get the set complement 
-$A^{\mathsf{c}}$ with \lstinline[style=inline]!A^{\mathsf{c}}!, 
-get $A^{\complement}$ with \lstinline[style=inline]!A^{\complement}!,
-or
-get $\bar{A}$ with \lstinline[style=inline]!\bar{A}!.
+$A^{\mathsf{c}}$ with \lstinline[style=inline]!A^{\mathsf{c}}! 
+(or $A^{\complement}$ with \lstinline[style=inline]!A^{\complement}!,
+or $\overline{A}$ with \lstinline[style=inline]!\overline{A}!).
 
 
 
@@ -199,6 +197,7 @@
 as in \lstinline[style=inline]!\vec{\imath}!.
 Some authors use boldface for 
 vectors: \lstinline[style=inline]!\boldsymbol{x}!.
+% Mention \bm?
 
 Entering \lstinline[style=inline]!\overline{x+y}! produces 
 $\overline{x+y}$,
@@ -213,8 +212,8 @@
 \section{Dots}
 Use low dots in a list 
 $\{0,1,2,\,\ldots\}$, entered as \lstinline[style=inline]!\{0,1,2,\,\ldots\}!. 
-(If you use \lstinline[style=inline]!\ldots! in plain text as
-\lstinline[style=inline]!London, Paris, \ldots{}\,.! note
+(If you use \lstinline[style=inline]!\ldots! in plain text as with
+\lstinline[style=inline]!London, Paris, \ldots{}\,.! then note
 the thinspace  \lstinline[style=inline]!\,! before the period.)
 Use centered dots in a sum or product 
 $1+\cdots+100$, entered as \lstinline[style=inline]!1+\cdots+100!.
@@ -315,14 +314,41 @@
       &$\checkmark$\quad \lstinline[style=inline]!\checkmark!   \\   
   \end{tabular}
 \end{center}
-Enter \lstinline[style=inline]!a|b! for the divides relation \( a|b \).
-Use \lstinline[style=inline]!\mid! as in  
-\lstinline[style=inline]!\{a\in S\mid\text{\(a=0\) or \(a\) is odd}\}!
-for the set \( \{a\in S \mid\text{\(a=0\) or \(a\) is odd}\} \).
+Use \lstinline[style=inline]!a\mid b! for the divides relation, 
+\mbox{$a\mid b$},
+and \lstinline[style=inline]!a\nmid b! for the negation,  \mbox{$a\nmid b$}.
+Also use \lstinline[style=inline]!\mid! to get 
+set builder notation \mbox{$\{a\in S \mid\text{$a$ is odd}\}$},
+with
+\lstinline[style=inline]!\{a\in S\mid\text{$a$ is odd}\}!.
 
+\section{Arrows} 
+\begin{center}
+  \begin{tabular}{@{}l*{1}{@{\hspace{1.5em}}l}@{}}
+    $\rightarrow$\quad \lstinline[style=inline]!\rightarrow!,
+        \lstinline[style=inline]!\to!
+      &$\mapsto$\quad \lstinline[style=inline]!\mapsto!                \\  
+    $\nrightarrow$\quad \lstinline[style=inline]!\nrightarrow!     
+      &$\longmapsto$\quad \lstinline[style=inline]!\longmapsto!         \\
+    $\longrightarrow$\quad \lstinline[style=inline]!\longrightarrow!
+      &$\leftarrow$\quad \lstinline[style=inline]!\leftarrow!         \\
+    $\Rightarrow$\quad \lstinline[style=inline]!\Rightarrow!
+      &$\leftrightarrow$\quad \lstinline[style=inline]!\leftrightarrow! \\
+    $\nRightarrow$\quad \lstinline[style=inline]!\nRightarrow!
+      &$\downarrow$\quad \lstinline[style=inline]!\downarrow!           \\   
+    $\Longrightarrow$\quad \lstinline[style=inline]!\Longrightarrow!
+      &$\uparrow$\quad \lstinline[style=inline]!\uparrow!               \\
+    $\leadsto$\quad \lstinline[style=inline]!\leadsto!
+      &$\updownarrow$\quad \lstinline[style=inline]!\updownarrow!      \\
+  \end{tabular}
+\end{center}
+The right arrows in the first column have matching left arrows, 
+such as \lstinline[style=inline]!\nleftarrow!,
+and there are some other matches for down arrows, etc.
+
 \section{Variable-sized operators}
 The summation
-\(\sum_{j=0}^3j^2\)\quad\lstinline[style=inline]!\sum_{j=0}^3 j^2!  
+$\sum_{j=0}^3j^2$\quad\lstinline[style=inline]!\sum_{j=0}^3 j^2!  
 and the integral $\int_{x=0}^3x^2\,dx$
 \lstinline[style=inline]!\int_{x=0}^3 x^2\,dx!
 expand when displayed.
@@ -345,30 +371,6 @@
   \end{tabular}
 \end{center}
 
-\section{Arrows} 
-\begin{center}
-  \begin{tabular}{@{}l*{1}{@{\hspace{1.5em}}l}@{}}
-    $\rightarrow$\quad \lstinline[style=inline]!\rightarrow!,
-        \lstinline[style=inline]!\to!
-      &$\mapsto$\quad \lstinline[style=inline]!\mapsto!                \\  
-    $\nrightarrow$\quad \lstinline[style=inline]!\nrightarrow!     
-      &$\longmapsto$\quad \lstinline[style=inline]!\longmapsto!         \\
-    $\longrightarrow$\quad \lstinline[style=inline]!\longrightarrow!
-      &$\leftarrow$\quad \lstinline[style=inline]!\leftarrow!         \\
-    $\Rightarrow$\quad \lstinline[style=inline]!\Rightarrow!
-      &$\leftrightarrow$\quad \lstinline[style=inline]!\leftrightarrow! \\
-    $\nRightarrow$\quad \lstinline[style=inline]!\nRightarrow!
-      &$\downarrow$\quad \lstinline[style=inline]!\downarrow!           \\   
-    $\Longrightarrow$\quad \lstinline[style=inline]!\Longrightarrow!
-      &$\uparrow$\quad \lstinline[style=inline]!\uparrow!               \\
-    $\leadsto$\quad \lstinline[style=inline]!\leadsto!
-      &$\updownarrow$\quad \lstinline[style=inline]!\updownarrow!      \\
-  \end{tabular}
-\end{center}
-The right arrows in the first column have matching left arrows, 
-such as \lstinline[style=inline]!\nleftarrow!,
-and there are some other matches for down arrows, etc.
-
 \section{Fences}
 \begin{center}
   \begin{tabular}{@{}*{2}{l@{\hspace{1.5em}}}l@{}}
@@ -382,9 +384,19 @@
       &$\lceil\;\rceil$\quad\lstinline[style=inline]!\lceil\rceil!     
   \end{tabular}
 \end{center}
-They will grow with the enclosed formula
-using  \lstinline[style=inline]!\left! and \lstinline[style=inline]!\right!.
+Fix the size with  
+\lstinline[style=inline]!\big!, 
+\lstinline[style=inline]!\Big!, 
+\lstinline[style=inline]!\bigg!, or 
+\lstinline[style=inline]!\Bigg!.
 \begin{center}
+  $\displaystyle\Big[\sum_{k=0}^n e^{k^2}\Big]$\quad
+    \lstinline[style=inline]!\Big[\sum_{k=0}^n e^{k^2}\Big]!
+\end{center}
+To have them grow with the enclosed formula,
+use \lstinline[style=inline]!\left! and \lstinline[style=inline]!\right!
+(although sometimes \lstinline[style=inline]!\big!, etc., are necessary).
+\begin{center}
   $\displaystyle\left\langle i,2^{2^i}\right\rangle$\quad
     \lstinline[style=inline]!\left\langle i,2^{2^i}\right\rangle!
 \end{center}
@@ -392,22 +404,13 @@
 \lstinline[style=inline]!\left! must match a
 \lstinline[style=inline]!\right!
 and they must end on the same line in the output.
-For a one-sided fence put a period
+For a one-sided fence, put a  
 \lstinline[style=inline]!\left.! or 
-\lstinline[style=inline]!\right.! on the other side.%
+\lstinline[style=inline]!\right.! on the other side.
 \begin{center}
   $\displaystyle\left.\frac{df}{dx}\right|_{x_0}$\quad
   \lstinline[style=inline]!\left.\frac{df}{dx}\right|_{x_0}!
 \end{center}
-Fix the size with  
-\lstinline[style=inline]!\big!, 
-\lstinline[style=inline]!\Big!, 
-\lstinline[style=inline]!\bigg!, or 
-\lstinline[style=inline]!\Bigg!.
-\begin{center}
-  $\displaystyle\Big[\sum_{k=0}^n e^{k^2}\Big]$\quad
-    \lstinline[style=inline]!\Big[\sum_{k=0}^n e^{k^2}\Big]!
-\end{center}
 
 
 \section{Arrays, Matrices}
@@ -441,7 +444,7 @@
 \begin{center}
   $\displaystyle
   f_n=\begin{cases}
-         a              &\text{if \(n=0\)}   \\
+         a              &\text{if $n=0$}   \\
          r\cdot f_{n-1}  &\text{else}   
        \end{cases}
   $
@@ -450,14 +453,15 @@
 \begin{lstlisting}[xleftmargin=-1em]
   f_n=
   \begin{cases}
-   a     &\text{if \(n=0\)} \\
+   a     &\text{if $n=0$} \\
    r\cdot f_{n-1} &\text{else}   
   \end{cases}
 \end{lstlisting}
 \end{minipage}
 \end{center}
-A matrix is another array variant.
-With this abbreviation you need not specify column alignments.
+A matrix is an array with fences.
+With a \lstinline[style=inline]!pmatrix! environment, 
+you need not specify column alignments.
 \begin{center}
   $\displaystyle
   \begin{pmatrix}
@@ -479,32 +483,42 @@
 and \lstinline[style=inline]!vmatrix! in display.
 
 \section{Spacing in mathematics}
-\begin{center}
-  \begin{tabular}{@{}*{1}{l@{\hspace{2.25em}}}l@{}}
-    \(\rightarrow\,\leftarrow\)\quad\lstinline[style=inline]!\,!
-      &\(\rightarrow\quad\leftarrow\)\quad\lstinline[style=inline]!\quad!   \\
-    \(\rightarrow\:\leftarrow\)\quad\lstinline[style=inline]!\:!
-      &\(\rightarrow\qquad\leftarrow\)\quad\lstinline[style=inline]!\qquad! \\
-    \(\rightarrow\;\leftarrow\)\quad\lstinline[style=inline]!\;!
-      &\(\rightarrow\!\leftarrow\)\quad\lstinline[style=inline]+\!+           
-  \end{tabular}
-\end{center}
-The left column spaces are in ratio \(3\mathbin{:}4\mathbin{:}5\).
-The last in the right column is a negative space, 
-opposite to \lstinline[style=inline]!\,!.
+Improve $\sqrt{2}x$ to  $\sqrt{2}\,x$ with a thin space, 
+as in \lstinline[style=inline]!\sqrt{2}\,x!.
+Slightly wider are \lstinline[style=inline]!\:!
+and \lstinline[style=inline]!\;! 
+(the three are in ratio $3\mathbin{:}4\mathbin{:}5$).
+Get the improvement of $n/\!\log n$ instead of $n/\log n$
+by using a negative thin space,
+as in \lstinline[style=inline]+n/\!\log n+. 
+Bigger spaces are: \lstinline[style=inline]!\quad! for 
+$\rightarrow\quad\leftarrow$, and \lstinline[style=inline]!\qquad! for 
+$\rightarrow\qquad\leftarrow$, 
+which are useful between parts of a display.
+% \begin{center}
+%   \begin{tabular}{@{}*{1}{l@{\hspace{2.25em}}}l@{}}
+%     $\rightarrow\mkern3mu\leftarrow$\quad\lstinline[style=inline]!\,!
+%       &$\rightarrow\quad\leftarrow$\quad\lstinline[style=inline]!\quad!   \\
+%     $\rightarrow\mkern4mu\leftarrow$\quad\lstinline[style=inline]!\:!
+%       &$\rightarrow\qquad\leftarrow$\quad\lstinline[style=inline]!\qquad! \\
+%     $\rightarrow\mkern5mu\leftarrow$\quad\lstinline[style=inline]!\;!
+%       &$\rightarrow\!\leftarrow$\quad\lstinline[style=inline]+\!+           
+%   \end{tabular}
+% \end{center}
 Get arbitrary space as in 
-% \(\rightarrow\hspace*{0.5cm}\leftarrow\)
-\lstinline[style=inline]!\hspace{0.5cm}!.
+% $\rightarrow\hspace*{0.5cm}\leftarrow$
+\lstinline[style=inline]!\hspace*{0.5cm}!.
 
 
 \section{Displayed equations}
-Put equations on a separate line with the
-\lstinline[style=inline]!equation*! environment.
+The
+\lstinline[style=inline]!equation*! environment
+puts an equation on a separate line.
 \begin{center}
 \vspace*{-\topsep}
   \begin{minipage}{0.25\linewidth}\vspace*{-\abovedisplayskip}
     \begin{equation*}
-      S=k\log W
+      S=k\cdot\lg W
     \end{equation*}
   \end{minipage}
   \quad
@@ -511,7 +525,7 @@
   \begin{minipage}{0.65\linewidth}
 \begin{lstlisting}[xleftmargin=0ex]
 \begin{equation*}
-  S=k\log W
+  S=k\cdot\lg W
 \end{equation*}
 \end{lstlisting}
   \end{minipage}
@@ -535,7 +549,7 @@
 \end{lstlisting}
   \end{minipage}
 \end{center}
-Align using the \lstinline[style=inline]!align*! environment
+Align equations using \lstinline[style=inline]!align*!
 \vspace*{-\topsep}
 \begin{center}
   \begin{minipage}[c]{0.25\linewidth}\vspace*{-\abovedisplayskip}
@@ -554,7 +568,7 @@
 \end{lstlisting}
   \end{minipage}
 \end{center}
-(you can have an empty left or right side of the alignment).
+(the left or right side of an alignment can be empty).
 For each environment, get a numbered version by 
 dropping the asterisk from the name.
 
@@ -563,19 +577,19 @@
 The last three here are display style.
 \begin{center} \small \def\arraystretch{2}
   \vspace*{-\topsep}\vspace*{-0.25cm}
-  \begin{tabular}{@{}r@{\hspace{1em}}l@{}}
-    \( f\colon\mathbb{R}\to\mathbb{R} \)  
-      &\lstinline[style=inline]!f\colon\mathbb{R}\to\mathbb{R}!      \\
-    \( 9.8~\text{m}/\text{s}^2 \)  
-      &\lstinline[style=inline]!9.8~\text{m}/\text{s}^2!      \\
+  \begin{tabular}{@{}l@{}}
+    $ f\colon\mathbb{R}\to\mathbb{R} $  
+      \quad\lstinline[style=inline]!f\colon\mathbb{R}\to\mathbb{R}!      \\
+    $ 9.8~\text{m}/\text{s}^2 $  
+      \quad\lstinline[style=inline]!9.8~\text{m}/\text{s}^2!      \\
     $\displaystyle
      \lim_{h\to 0}\frac{f(x+h)-f(x)}{h}
     $
-    &\lstinline[style=inline]!\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}!   \\
+    \quad\lstinline[style=inline]!\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}!   \\
     $\displaystyle
      \int x^2\,dx=x^3/3+C
     $
-    &\lstinline[style=inline]!\int x^2\,dx=x^3/3+C!             \\
+    \quad\lstinline[style=inline]!\int x^2\,dx=x^3/3+C!             \\
     % $\displaystyle
     %  \frac{dy}{dx}=\frac{dy}{du}\frac{du}{dx}
     % $
@@ -585,41 +599,41 @@
              +\boldsymbol{j}\frac{d}{dy}
              +\boldsymbol{k}\frac{d}{dz}
     $
-    &\lstinline[style=inline]!\nabla=\boldsymbol{i}\frac{d}{dx}+!\,\(\cdots\)\\
+    \quad\lstinline[style=inline]!\nabla=\boldsymbol{i}\frac{d}{dx}+!\,$\cdots$\\
   \end{tabular}
 \end{center}
 
 \section{Discrete mathematics examples}
 There are four modulo forms: 
-\(m\bmod n\) is from \lstinline[style=inline]!m\bmod n!,
-and \(a\equiv b\pmod m\) is from \lstinline[style=inline]!a\equiv b\pmod m!,
-and \(a\equiv b\mod m\) is from \lstinline[style=inline]!a\equiv b\mod m!,
-and \(a\equiv b\pod m\) is from \lstinline[style=inline]!a\equiv b\pod m!.
+$m\bmod n$ is from \lstinline[style=inline]!m\bmod n!,
+and $a\equiv b\pmod m$ is from \lstinline[style=inline]!a\equiv b\pmod m!,
+and $a\equiv b\mod m$ is from \lstinline[style=inline]!a\equiv b\mod m!,
+and $a\equiv b\pod m$ is from \lstinline[style=inline]!a\equiv b\pod m!.
 
 For combinations the binomial symbol $\binom{n}{k}$ is from
 \lstinline[style=inline]!\binom{n}{k}!.
 This resizes to be bigger in a display
 (to require the display version use \lstinline[style=inline]!\dbinom{n}{k}!
-and for the inline version use \lstinline[style=inline]!\tbinom{n}{k}!).
+and require the inline version with \lstinline[style=inline]!\tbinom{n}{k}!).
 
 For permutations use 
-\( n^{\underline{r}} \) from \lstinline[style=inline]!n^{\underline{r}}! 
-(some authors use \( P(n,r) \), 
-or \( {}_nP_r \) from  \lstinline[style=inline]!{}_nP_r!).
+$ n^{\underline{r}} $ from \lstinline[style=inline]!n^{\underline{r}}! 
+(some authors use $ P(n,r) $, 
+or $ {}_nP_r $ from  \lstinline[style=inline]!{}_nP_r!).
 
 
 \section{Statistics examples}
 \begin{center} \small\def\arraystretch{1.5}
   \vspace*{-\topsep}\vspace*{-0.15cm}
-  \begin{tabular}{@{}r@{\hspace{1em}}l@{}}
+  \begin{tabular}{@{}l@{}}
     $
-     \sigma^2=\sqrt{\sum (x_i-\mu)^2/N}
+     \sigma^2=\sqrt{\,\sum (x_i-\mu)^2/N}
     $
-    &\lstinline[style=inline]!\sigma^2=\sqrt{\sum (x_i-\mu)^2/N}!   \\
+    \quad\lstinline[style=inline]!\sigma^2=\sqrt{\,\sum (x_i-\mu)^2/N}!   \\
     $
      E(X)=\mu_X=\sum (x_i-P(x_i))
     $
-    &\lstinline[style=inline]! E(X)=\mu_X=\sum (x_i-P(x_i))!             \\
+    \quad\lstinline[style=inline]! E(X)=\mu_X=\sum (x_i-P(x_i))!             \\
   \end{tabular}
 \end{center}
 The probability density of the normal distribution 
@@ -644,6 +658,6 @@
 \noindent\parbox{\columnwidth}{\small%
 {\color{headcolor}\hrulefill\\
 \vspace*{0ex}
-Jim Hef{}feron, Saint Michael's College, VT USA\hfill 2017-Jan-10
+Jim Hef{}feron, Saint Michael's College, VT USA\hfill 2020-Dec-30
 }}
 \end{document}

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