invariant function的用法和樣例：
例句
- The charaters after affine transformation can also be recognized by a dyadic wavelet affine invariant function.
仿射變換后的漢字或其它圖像可用多尺度小波的仿射不變函數進行對比識別。 - Maximum modulus principle plays an important role in the complex analytics, and it is a powerful tool in studying the analytic function.
摘要最大模原理在複變函數論中佔有重要的地位，是研究解析函數的有力工具。
