- 变换群 biànhuànqún transformation group(mathematics) transformation group
- 傅立叶变换 Fùlìyèbiànhuàn Fourier transform(math.) Fourier transform
- 射影变换 shèyǐngbiànhuàn projective transformationa projective transformation
- 积分变换 jīfēnbiànhuàn integral transformintegral transform in mathematics
- 阻抗变换器 zǔkàngbiànhuànqì impedance converter