No label defined (Q4199156)
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scientific article; zbMATH DE number 3638405
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article; zbMATH DE number 3638405 |
Statements
1979
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smoothness of solutions
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vector fields
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hypoellipticity
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operator on a nilpotent group
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