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group algebra

Can anyone help in writing a code to find the list of idempotent and primitive elements of a group algebra, the examples goes like this. Let p be an odd prime such that ˉ2 generates U(Zp2) and G=(ideal generated by a)∗ (ideal generated by b) an abelian group, with o(a)=p2 and o(b)=p. Then F2G has four inequivalent minimal codes, namely, the ones generated by the idempotents e0=ˆG, e1=ˆb^(idealgeneratedbya)(idealgeneratedbyb)(note: its a big hat), e2=^aG and e3=^(idealgeneratedbyap)(idealgeneratedbyb)ˆG.

group algebra

Can anyone help in writing a code to find the list of idempotent and primitive elements of a group algebra, the algebra?

The examples goes like this. Let p p be an odd prime such that ˉ2 generates U(Zp2) and G=(ideal let $G =(\text{ideal generated by a)∗ (ideal }a) ∗ (\text{ideal generated by b) }b)$ an abelian group, with o(a)=p2 and o(b)=p. o(b)=p.

Then F2G has four inequivalent minimal codes, namely, the ones generated by the idempotents e0=ˆG, $e_1=\hat{b}−\hat{(ideal idempotents:

e0=ˆG $$e_1=\hat{b}−\widehat{(\text{ideal generated by 'a')∗ (ideal }a)∗ (\text{ideal generated by 'b')}(note:itsabighat),e_2=\hat{a−G}ande_3=\hat{(ideal }b)}e_2=\widehat{a−G}e_3=\widehat{(\text{ideal generated by 'a_p')∗ (ideal }a_p)∗ (\text{ideal generated by 'b')}−\hat{G}$.}b)}−\hat{G}$$

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updated 5 years ago

FrédéricC gravatar image

group algebra

Can anyone help in writing code to find the list of idempotent and primitive elements of a group algebra?

The examples goes like this. Let p be an odd prime such that ˉ2 generates U(Zp2) and let G=(ideal generated by a)(ideal generated by b) an abelian group, with o(a)=p2 and o(b)=p.

Then F2G has four inequivalent minimal codes, namely, the ones generated by the idempotents:

e0=ˆG e1=ˆb^(ideal generated by a)(ideal generated by b) e2=^aG e3=^(ideal generated by ap)(ideal generated by b)ˆG