From 82e0c0dae10e58e5a15d3930baeb031585e7946f Mon Sep 17 00:00:00 2001
From: Varun Agrawal <varagrawal@gmail.com>
Date: Wed, 3 Jan 2024 16:26:05 -0500
Subject: [PATCH] take comment all the way

---
 gtsam/linear/GaussianConditional.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gtsam/linear/GaussianConditional.cpp b/gtsam/linear/GaussianConditional.cpp
index 4ec1d8b95..d59070aaf 100644
--- a/gtsam/linear/GaussianConditional.cpp
+++ b/gtsam/linear/GaussianConditional.cpp
@@ -186,7 +186,10 @@ namespace gtsam {
     size_t n = d().size();
     // Sigma = (R'R)^{-1}, det(Sigma) = det((R'R)^{-1}) = det(R'R)^{-1}
     // log det(Sigma) = -log(det(R'R)) = -2*log(det(R))
-    // Hence, log det(Sigma)) = - 2.0 * logDeterminant()
+    // Hence, log det(Sigma)) = -2.0 * logDeterminant()
+    // which gives log = -0.5*n*log(2*pi) - 0.5*(-2.0 * logDeterminant())
+    //     = -0.5*n*log(2*pi) + (0.5*2.0 * logDeterminant())
+    //     = -0.5*n*log(2*pi) + logDeterminant()
     return -0.5 * n * log2pi + logDeterminant();
   }