diff --git a/index.qmd b/index.qmd
index 1858a76..2d31aea 100644
--- a/index.qmd
+++ b/index.qmd
@@ -2,6 +2,8 @@
 title: "Posts by topic"
 listing:
   contents:
+    - posts/type-algebra/index.*
+    - posts/finite-field/index.*
     - posts/number-number/index.*
     - posts/permutations/index.*
     - posts/stereo/index.*
diff --git a/posts/type-algebra/_metadata.yml b/posts/type-algebra/_metadata.yml
new file mode 100644
index 0000000..eaf1857
--- /dev/null
+++ b/posts/type-algebra/_metadata.yml
@@ -0,0 +1,5 @@
+# freeze computational output
+freeze: auto
+
+# Enable banner style title blocks
+title-block-banner: true
diff --git a/posts/type-algebra/index.qmd b/posts/type-algebra/index.qmd
new file mode 100644
index 0000000..bd84989
--- /dev/null
+++ b/posts/type-algebra/index.qmd
@@ -0,0 +1,10 @@
+---
+title: "Type Algebra and You"
+listing:
+  contents: .
+  sort: "date"
+---
+
+Articles about the arithmetic manipulation of algebraic types.
+
+Publication dates correspond to the original WordPress publication dates.