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 Add generic character table for SL(2,q), with q odd and non-square? #23

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fingolfin opened this issue Feb 29, 2024 · 4 comments
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new table New generic character table question Further information is requested

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@fingolfin
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There may be good reasons this is not in here: e.g. it may not fit into the data format. Or it is not as useful due to the exceptions. Or whatever. But it might be worth figuring out...

That said, the table cane be found on page 58 (Table 5.4) in

Cédric Bonnafé, Representations of $\mathrm{SL}_2(\mathbb{F}_q)$, https://doi.org/10.1007/978-0-85729-157-8

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@fingolfin fingolfin changed the title Add generic character table for SL(2,q), with q odd Add generic character table for SL(2,q), with q odd ? Mar 5, 2024
@SoongNoonien SoongNoonien added question Further information is requested new table New generic character table labels Apr 16, 2024
@SoongNoonien
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Maybe I'm missing something but we have SL2.1, isn't that what you are looking for?

@fingolfin fingolfin changed the title Add generic character table for SL(2,q), with q odd ?  Add generic character table for SL(2,q), with q odd and non-square? Nov 7, 2024
@fingolfin
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I think SL2.1 only covers the case $\mathrm{SL}_2(q^2)$ and $q$ odd, i.e. over fields of square size.

I adjusted the title to clarify that the missing case is $q$ odd and not a square.

@fingolfin
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That said, in SL2.0 it indeed says:

See SL2.1 for the generic character table of $SL_2(q)$, $q$ odd

@SoongNoonien
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SoongNoonien commented Nov 8, 2024

In the info string of SL2.1 it says:

Information about the generic character table of $SL_2(q^2)$,
$q^2$ odd. The possible values for q are given by
$q^2 = p^m$ with m a non negative integer and $p$ a prime number.

I think it's $q^2$ to avoid $\sqrt{q}$ in the table.

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