修改公式错误

异或运算反演UFWT中疑似 = 打成了 -

diff --git a/docs/math/poly/fwt.md b/docs/math/poly/fwt.md
index 3bcba1a..8309b9d 100644 (file)
--- a/docs/math/poly/fwt.md
+++ b/docs/math/poly/fwt.md
@@ -95,7 +95,7 @@ FWT[A] = merge(FWT[A_0] + FWT[A_1], FWT[A_0] - FWT[A_1])
 $$
 
 $$
-UFWT[A'] - merge(\frac{FWT[A_0'] + FWT[A_1']}{2}, \frac{FWT[A_0'] - FWT[A_1']}{2})
+UFWT[A'] = merge(\frac{FWT[A_0'] + FWT[A_1']}{2}, \frac{FWT[A_0'] - FWT[A_1']}{2})
 $$
 
 ### 同或运算