Timeline for One question on block-circulant matrices
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Nov 3, 2022 at 12:35 | comment | added | Denis Serre | @PadraigÓCatháin I don't think so. I don't use the multiplication of blocks. The formula $K=U^*DU$ where $D$ is block-diagonal is always valid. And it is known that $\det D$ is the product of the determinants of the diagonal blocks. | |
| Nov 3, 2022 at 10:45 | comment | added | Padraig Ó Catháin | Block-circulant can be used in two senses: that the blocks are circulant, or that the template in which the blocks are placed is circulant. Your formula requires both senses! In general, there are formulas for determinants of a block matrix in terms of polynomial expressions in the blocks provided that the blocks commute. | |
| Nov 2, 2022 at 23:04 | vote | accept | user369335 | ||
| Nov 2, 2022 at 19:54 | history | edited | Denis Serre | CC BY-SA 4.0 |
added 223 characters in body
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| Nov 2, 2022 at 17:03 | history | answered | Denis Serre | CC BY-SA 4.0 |