East Asian mathematical journal

The Youngnam Mathematical Society (영남수학회)
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SYMBOLS OF MINIMUM TYPE AND OF ZERO CLASS IN EXPONENTIAL CALCULUS

  • Received : 2017.11.21
  • Accepted : 2018.01.02
  • Published : 2018.01.31
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Abstract

We introduce formal symbols of product type, of zero class, and of minimum type and show that the formal power series representations for $e^p$ and $e^q$ are formal symbols of product type giving the same pseudodifferential operator, where p and q are formal symbols of minimum type and p - q is of zero class.

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References

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