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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Quantization and Arithmetic

Quantization and Arithmetic

Unterberger, André

Paperback

Series: Pseudo-Differential Operators, Book 1

General Mathematics

ISBN10: 3764387904
ISBN13: 9783764387907
Publisher: Birkhauser
Published: Jun 23 2008
Pages: 147
Weight: 0.85
Height: 0.40 Width: 6.60 Depth: 9.30
Language: English
(12) (4) Let ? be the unique even non-trivial Dirichlet character mod 12, and let ? be the unique (odd) non-trivial Dirichlet character mod 4. Consider on the line the distributions m (12) ? d (x)= ? (m)? x?, even 12 m?Z m (4) d (x)= ? (m)? x? . (1.1) odd 2 m?Z 2 i?x UnderaFouriertransformation, orundermultiplicationbythefunctionx ? e, the?rst(resp. second)ofthesedistributionsonlyundergoesmultiplicationbysome 24th (resp. 8th) root of unity. Then, consider the metaplectic representation Met, 2 a unitary representation in L (R) of the metaplectic group G, the twofold cover of the group G = SL(2, R), the de?nition of which will be recalled in Section 2: it extends as a representation in the spaceS (R) of tempered distributions. From what has just been said, if g ~ is a point of G lying above g? G, andif d = d even g ~ ?1 or d, the distribution d =Met(g~ )d only depends on the class of g in the odd homogeneousspace?\G=SL(2, Z)\G, uptomultiplicationbysomephasefactor, by which we mean any complex number of absolute value 1 depending only on g ~. On the other hand, a function u?S(R) is perfectly characterized by its scalar g ~ productsagainstthedistributionsd, sinceonehasforsomeappropriateconstants C, C the identities 0 1 g ~ 2 2 d, u dg = C u if u is even, 2 0 even L (R) ?\G

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