Timeline for relating class number and narrow class number of a real field
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Dec 8, 2022 at 17:36 | comment | added | Franz Lemmermeyer | Among the references given in the preface of link.springer.com/book/10.1007/978-3-030-01512-1, there is Verhoek's thesis universiteitleiden.nl/binaries/content/assets/science/mi/… | |
| Dec 8, 2022 at 17:04 | comment | added | did | Thank you both. @HenriCohen do you have a precise reference for this (the narrow class number)? | |
| Dec 7, 2022 at 23:22 | comment | added | Henri Cohen | Franz is of course correct, and for info, for $p<163$ the class number is $1$ (well-known) and the narrow class number is also $1$ except for $p=29$ and $p=113$ for which it is equal to $8$. For $p=163$ they are both equal to $4$. | |
| Dec 7, 2022 at 22:51 | comment | added | Franz Lemmermeyer | keywords: signature cyclotomic units | |
| Dec 7, 2022 at 16:51 | history | edited | YCor |
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| Dec 7, 2022 at 16:33 | history | asked | did | CC BY-SA 4.0 |