Override bootstrap defaults for section headings

Bullock_Mathjax_v3.js

@@ -0,0 +1,48 @@
+<script>
+  // Created by the MathJax v2 to v3 converter at 
+  // https://mathjax.github.io/MathJax-demos-web/convert-configuration/convert-configuration.html.
+  // [2021 04 09]
+
+  // This script works, more or less. But I am sticking with MathJax v2 and
+  // Bullock_MathJax_v2.js for now because using MathJax v3 has a few 
+  // quirks and no obvious advantages. In particular, there still doesn't 
+  // seem to be a good way to scale inline and display equations at 
+  // different rates: there still seems to be only a single "scale" 
+  // parameter. (See https://stackoverflow.com/questions/8544333/ for a
+  // hacky workaround from 2011.)  [2021 04 09]
+
+  // To insert this script into an R Markdown file, put it in a 
+  // <script type="text/x-mathjax-config"> container.  [2020 02 17]
+
+  // On defining TeX macros, see http://docs.mathjax.org/en/latest/input/tex/macros.html.
+  // I've had some trouble getting \ensuremath{} to work, though Stack 
+  // Overflow posts suggest that it does.  [2021 01 24]
+
+  window.MathJax = {
+    chtml: {
+      scale: 0.85,
+      displayAlign: "center"
+    },
+    tex: {
+      macros: {
+        backtwo: "\\mspace{-2mu}",
+        cov: ["\\textrm{cov}\\backtwo\\left(#1\\right)", 1],
+        E: ["E\\backtwo\\left[#1\\right]", 1],
+        independent: "\\perp\\!\\!\\!\\!\\!\\!\\perp",
+        matwo: ["\\left[\\begin{array}{#1} #2 & #3\\\\#4 & #5\\end{array}\\right]", 5, "cc"],
+        sd: ["\\textrm{sd}\\backtwo\\left(#1\\right)", 1],
+        var: ["\\textrm{var}\\backtwo\\left(#1\\right)", 1],
+        vtwo: ["\\left[\\begin{array}{#1} #2\\\\#3\\end{array}\\right]", 3, "c"]
+      },
+      packages: {'[+]': ['noerrors', 'cancel', 'color', 'enclose']}
+    },
+    options: {
+      ignoreHtmlClass: 'tex2jax_ignore',
+      processHtmlClass: 'tex2jax_process'
+    },
+    loader: {
+      load: ['input/asciimath', '[tex]/noerrors', '[tex]/cancel', '[tex]/color', '[tex]/enclose']
+    }
+  };
+
+</script>

Bullock_R_markdown.css

@@ -135,10 +135,12 @@ h4 {
 }  
 
 h1, h2, h3, h4 { 
+  border-bottom: 0;
   break-after: avoid;
   page-break-after: avoid;
   line-height: 1.4em;
   margin-bottom: 0.4ex;
+  padding-bottom: 0;
 }
 
 

Bullock_xaringan.js

@@ -43,5 +43,23 @@
   let myLists7 = document.querySelectorAll(".listStart7 ol");
   myLists7.forEach(function (x) { x.setAttribute("start", 7) } );
 
+
+  /* Slide numbering when I have appendix slides. The idea is that I may have  
+     30 slides but want the numbers in the lower right-hand corner to say 
+     2/20, 2/20, 3/20, etc. -- to prevent the audience from thinking that I 
+     need to get through 30 slides. 
+       This function works, in the sense that I can call it in the console. 
+    But I haven't found a way to work it into the display of slide numbers
+    in the lower right-hand side of the screen. */
+  function numLastMainSlide() { 
+    return slideshow.getSlideByName("lastMainSlide").getSlideNumber(); 
+  }  
+
+
+
 //}
 </script>
+
+
+
+