Positive definite rational functions of two variables which are not the sum of three squares (Q1227784)
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scientific article; zbMATH DE number 3517299
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Positive definite rational functions of two variables which are not the sum of three squares |
scientific article; zbMATH DE number 3517299 |
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Positive definite rational functions of two variables which are not the sum of three squares (English)
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1976
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