From 6736f53ec298448566d6ce41e5395c6c1ce966b6 Mon Sep 17 00:00:00 2001
From: Chin-Yun Yu <chin-yun.yu@qmul.ac.uk>
Date: Mon, 15 Apr 2024 14:22:12 +0000
Subject: [PATCH] update notation

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2b74c42..2214d7d 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ The first $N$ outputs are the gradients to $`y_t|_{t \leq 0}`$ and the rest are
 
 ### Time-invariant filtering
 
-In the time-invariant setting, $`A_{t', i} = A_{t, i} \forall t, t' \in [1, T]`$ and the filter is simplified to
+In the time-invariant setting, $`A_{t, i} = A_{1, i} \forall t \in [1, T]`$ and the filter is simplified to
 
 ```math
 y_t = x_t - \sum_{i=1}^N a_i y_{t-i}, \mathbf{a} = A_{1,:}.