Fourth order tensors and covariance tensors (Q6040501)
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scientific article; zbMATH DE number 7686932
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Fourth order tensors and covariance tensors |
scientific article; zbMATH DE number 7686932 |
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Fourth order tensors and covariance tensors (English)
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17 May 2023
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The authors provide several conditions for the invertibility of fourth-order cubic tensors. Also, they define the covariance tensor of a random matrix as a fourth-order tensor and state that this tensor is positive whenever the associated matrix is symmetric.
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fourth-order tensor
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moment
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random matrix
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covariance tensor
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