Recently, Van‐Erp and Yuncken and independently Choi and Ponge defined an inhomogeneous deformation groupoid. As shown by Van‐Erp and Yuncken, this deformation groupoid allows to fully recovers the general inhomogeneous pseudo‐differential calculus.

中文翻译：

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关于非均匀伪微积分的变形群

最近，Van‐Erp和Yuncken以及Choi和Ponge独立地定义了一个不均匀的变形群。如Van-Erp和Yuncken所示，该变形群可以完全恢复一般的非齐次伪微积分。