| Title: | On critical values of twisted Artin $L$-functions (English) | 
| Author: | Wong, Peng-Jie | 
| Language: | English | 
| Journal: | Czechoslovak Mathematical Journal | 
| ISSN: | 0011-4642 (print) | 
| ISSN: | 1572-9141 (online) | 
| Volume: | 67 | 
| Issue: | 2 | 
| Year: | 2017 | 
| Pages: | 551-555 | 
| Summary lang: | English | 
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| Category: | math | 
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| Summary: | We give a simple proof that critical values of any Artin $L$-function attached to a representation $\rho $ with character $\chi _{\rho }$ are stable under twisting by a totally even character $\chi $, up to the $\dim \rho $-th power of the Gauss sum related to $\chi $ and an element in the field generated by the values of $\chi _{\rho }$ and $\chi $ over $\mathbb {Q}$. This extends a result of Coates and Lichtenbaum as well as the previous work of Ward. (English) | 
| Keyword: | Artin $L$-function | 
| Keyword: | character | 
| Keyword: | Galois Gauss sum | 
| Keyword: | special value | 
| MSC: | 11F67 | 
| MSC: | 11F80 | 
| MSC: | 11L05 | 
| MSC: | 11M06 | 
| idZBL: | Zbl 06738538 | 
| idMR: | MR3661060 | 
| DOI: | 10.21136/CMJ.2017.0134-16 | 
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| Date available: | 2017-06-01T14:33:09Z | 
| Last updated: | 2020-07-03 | 
| Stable URL: | http://hdl.handle.net/10338.dmlcz/146775 | 
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| Reference: | [1] Coates, J., Lichtenbaum, S.: On $l$-adic zeta functions.Ann. Math. (2) 98 (1973), 498-550. Zbl 0279.12005, MR 0330107, 10.2307/1970916 | 
| Reference: | [2] Klingen, H.: Über die Werte der Dedekindschen Zetafunktion.Math. Ann. 145 (1962), 265-272 German. Zbl 0101.03002, MR 0133304, 10.1007/BF01451369 | 
| Reference: | [3] Martinet, J.: Character theory and Artin $L$-functions.Algebraic Number Fields Proc. Symp. London math. Soc., Univ. Durham 1975, Academic Press, London (1977), 1-87. Zbl 0359.12015, MR 0447187 | 
| Reference: | [4] Neukirch, J.: Algebraic Number Theory.Grundlehren der Mathematischen Wissenschaften 322, Springer, Berlin (1999). Zbl 0956.11021, MR 1697859, 10.1007/978-3-662-03983-0 | 
| Reference: | [5] Siegel, C. L.: Über die Fourierschen Koeffizienten von Modulformen.Nachr. Akad. Wiss. Göttingen, II. Math.-Phys. Kl. 3 (1970), 15-56 German. Zbl 0225.10031, MR 0285488 | 
| Reference: | [6] Ward, K.: Values of twisted Artin $L$-functions.Arch. Math. 103 (2014), 285-290. Zbl 1314.11035, MR 3266371, 10.1007/s00013-014-0692-7 | 
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