The authors of this book however do not motivate their book at all with any history or with any discussion of elliptic operators but instead proceed from a purely algebraic/axiomatic point of view.

• 这本书的作者但是不， 或者有任何讨论的省略操作者确实有任何历史激励书但是改为起源于一完全代数学/无须证明观点。