From e2b85ff23640ea7bb464ab6c4282ff2a58b058e7 Mon Sep 17 00:00:00 2001
From: nunzip <np.scarh@gmail.com>
Date: Mon, 10 Dec 2018 19:53:10 +0000
Subject: Add mahalanobis PSD

---
 report2/paper.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'report2/paper.md')

diff --git a/report2/paper.md b/report2/paper.md
index 86cf687..cf8221a 100755
--- a/report2/paper.md
+++ b/report2/paper.md
@@ -143,7 +143,8 @@ the local minimum achieved at 60 clusters (figure \ref{fig:kmeans}). ###EXPLAIN
 We were not able to achieve significant improvements using mahalanobis for 
 original distance ranking compared to square euclidiaen metrics. Results can 
 be observed using the `-m|--mahalanobis` when running evalution with the 
-repository complimenting this paper.
+repository complimenting this paper. It has been verified that the inverse
+covariance matrix used is PSD, satisfying $d_a(x_1,x_2) \geq 0$.
 
 # Conclusion
 
-- 
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