Timeline for Why is p=2 special, if we want to classify cplx. representation of GL2(Zp)?
Current License: CC BY-SA 2.5
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| Mar 23, 2011 at 18:22 | comment | added | Ramsey | @Lubin. Thanks - that's the formula I had in the back of my mind, but didn't think it through. I suppose I should have been a little more specific and a little less lazy... | |
| Mar 23, 2011 at 16:38 | comment | added | Lubin | "Grows exponentially": sure, in the $p=2$ case, $K^*/(K^*)^2$ has dimension $n+2$ over $\mathbb{Z}/(2)$, so there are $2^{n+2}-1$ quadratic extensions over a field of degree $n$ over $\mathbb{Q}_2$ | |
| Mar 23, 2011 at 13:49 | history | answered | Ramsey | CC BY-SA 2.5 |