diff --git a/SM3中的FF2和GG2函数.md b/SM3中的FF2和GG2函数.md
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+# 定义
+$FF2(X, Y, Z) = (X \land Y) \lor (X \land Z) \lor (Y \land Z)$  
+$GG2(X, Y, Z) = (X \land Y) \lor (\lnot X \land Z)$
+
+# 等价公式
+$FF2(X, Y, Z) = (X \land Y) \bigoplus (X \land Z) \bigoplus (Y \land Z)$  
+$GG2(X, Y, Z) = (Y \bigoplus Z) \land X \bigoplus Z$
+
+# 验证
+
+|X|Y|Z|$(X \land Y) \lor (X \land Z) \lor (Y \land Z)$ |$(X \land Y) \bigoplus (X \land Z) \bigoplus (Y \land Z)$|$(X \land Y) \lor (\lnot X \land Z)$|$(Y \bigoplus Z) \land X \bigoplus Z$|
+|----|----|----|----|----|----|----|
+|0|0|0|0|0|0|0|
+|0|0|1|0|0|1|1|
+|0|1|0|0|0|0|0|
+|0|1|1|1|1|1|1|
+|1|0|0|0|0|0|0|
+|1|0|1|1|1|0|0|
+|1|1|0|1|1|1|1|
+|1|1|1|1|1|1|1|
+
+# 证明
+TODO
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