From 93689618c67e8d6f5db9702097d614d3fbd1ab57 Mon Sep 17 00:00:00 2001
From: JJ
Date: Sun, 17 Mar 2024 13:26:54 -0700
Subject: meow

---
 404.html                  | 3 +--
 _layouts/linguistics.html | 2 +-
 ctf/index.md              | 6 +++---
 linguistics/semantics.md  | 7 +++++++
 mathematics/algebra.md    | 7 +++----
 5 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/404.html b/404.html
index 6a4e9d3..ef198cd 100644
--- a/404.html
+++ b/404.html
@@ -14,9 +14,8 @@ title: 404
   </nav>
 </div>
 </header>
-<main>
+<main style="text-align: center;">
 <br>
 <h2 style="margin: 20px;">404</h2>
 <span>Page not found</span>
 </main>
-
diff --git a/_layouts/linguistics.html b/_layouts/linguistics.html
index 97c21d1..15b2ffc 100644
--- a/_layouts/linguistics.html
+++ b/_layouts/linguistics.html
@@ -15,7 +15,7 @@ layout: default
     <a href="/linguistics/glossary">glossary</a>
     <a href="/linguistics/syntax">syntax</a>
     <a href="/linguistics/semantics">semantics</a>
-    <a href="/linguistics/types">types</a>
+    <a href="/linguistics/pragmatics">pragmatics</a>
   </nav>
 </div>
 </header>
diff --git a/ctf/index.md b/ctf/index.md
index 5a5c15a..511a415 100644
--- a/ctf/index.md
+++ b/ctf/index.md
@@ -20,10 +20,10 @@ a list of past, present, and future ctfs can be found on [ctftime](https://ctfti
 while competing in ctfs can be group work: practice is overwhelmingly a solo activity.
 to get good at playing in ctfs, one must learn to be very comfortable learning on their own.
 
-<ul style="display: flex; flex-direction: row; justify-content: space-evenly; list-style: none;">
+<!-- <ul style="display: flex; flex-direction: row; justify-content: space-evenly; list-style: none;">
   <li><h2><a href="crypto">crypto</a></h2></li>
   <li><h2><a href="rev">rev</a></h2></li>
   <li><h2><a href="pwn">pwn</a></h2></li>
   <li><h2><a href="web">web</a></h2></li>
-  <!-- <li><h2><a href="misc">misc</a></h2></li> -->
-</ul>
+  <li><h2><a href="misc">misc</a></h2></li>
+</ul> -->
diff --git a/linguistics/semantics.md b/linguistics/semantics.md
index 7615145..fc7feb2 100644
--- a/linguistics/semantics.md
+++ b/linguistics/semantics.md
@@ -11,3 +11,10 @@ How do we know what sentences are true and which are false?<br>
 What does it *mean* for a sentence to be true?<br>
 What conditions must hold for a sentence to be true?
 
+Formal semantics attempts to answer those questions by providing a *framework* for determining what *conditions* must hold for a sentence to be true.
+
+This framework is [first-order/predicate logic](../mathematics/logic) and the [simply-typed lambda calculus](../plt/lambda-calculus). On top of this, we often build set theory, relying on *characteristic functions* of the lambda calculus to denote *set membership*.
+
+
+## Resources
+- ✨ [Invitation to Formal Semantics](https://eecoppock.info/bootcamp/semantics-boot-camp.pdf)
diff --git a/mathematics/algebra.md b/mathematics/algebra.md
index 1da221b..0ba7847 100644
--- a/mathematics/algebra.md
+++ b/mathematics/algebra.md
@@ -5,8 +5,7 @@ title: mathematics/algebra
 
 # algebra
 
-modern algebra is the study of **algebraic structures**: groups, rings, fields, modules, and the like.
-these structures are very abstract: and so results can be applied to a wide variety of situations.
+Modern algebra is the study of **algebraic structures**: groups, rings, fields, modules, and the like. These structures are very abstract: and so results can be applied to a wide variety of situations.
 
 ## structures
 
@@ -45,8 +44,8 @@ A **vector space** $V$ over a field $F$ of scalars is a set with a binary operat
   - additive inverse: $∀v, ∃-v: v+(-v) = 0$
   - commutativity: $∀u,v : u+v=v+u$
 - $(V, )$ is a *scalar operation*:
-  - scalar identity: $∃1 ∈ F : 1v = v1 = v$
-  - commutativity: $∀a,b ∈ F, ∀v ∈ V (ab)v = a(bv)$
+  - scalar identity: $∃1 ∈ F, ∀v ∈ V : 1v = v1 = v$
+  - commutativity: $∀a,b ∈ F, ∀v ∈ V : (ab)v = a(bv)$
 - The *distributive laws* hold:
   - $∀a ∈ F, ∀u,v ∈ V : a(u+v) = au+av$
   - $∀a,b ∈ F, ∀v ∈ V : (a+b)v = av + bv$
-- 
cgit v1.2.3-70-g09d2