| 31. | Where \ hat O is a differential operator with \ varphi and J functions of spacetime.
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| 32. | In an analogous way one can obtain finite difference approximations to higher order derivatives and differential operators.
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| 33. | Most version of the index theorem can be extended from elliptic differential operators to elliptic pseudodifferential operators.
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| 34. | In 1970 he gave a plenary address ( Linear Differential Operators ) at the ICM in Nice.
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| 35. | Polynomials are fine . ) The exponential over a differential operator is understood as a power series.
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| 36. | They are also special cases of pseudo-differential operators, and more generally Fourier integral operators.
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| 37. | In particular, in this connection it leads to the notion of a pseudo-differential operator.
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| 38. | More generally, consider linear differential operators acting on infinitely differentiable complex-valued functions of compact support.
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| 39. | If differential operators are needed to describe the original system, their scaled counterparts become dimensionless differential operators.
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| 40. | If differential operators are needed to describe the original system, their scaled counterparts become dimensionless differential operators.
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