Jonathan

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11 Questions

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7	Calculating fixed field of a particular action
7	Lines in projective space
6	Finding singular points and computing dimension of tangent spaces (only for the brave)
5	Example of field $K$ with $\mathrm{char}(K) > 0 $, such that $[K(\alpha):K] = [K(\beta):K]$ but $K(\alpha) \not \cong K(\beta)$
4	Showing polynomials in $k[x_1, \ldots , x_n]$ are irreducible

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354 Reputation

+5	Showing polynomials in $k[x_1, \ldots , x_n]$ are irreducible
+15	Lines in projective space
+5	Degree of a morphism of projective curves
+5	Example of field $K$ with $\mathrm{char}(K) > 0 $, such that $[K(\alpha):K] = [K(\beta):K]$ but $K(\alpha) \not \cong K(\beta)$

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1 Answer

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12	A group where every two elements different than 1 are conjugate has order 1 or 2.

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12 group-theory	0 field-theory
0 algebraic-geometry × 7	0 polynomials
0 commutative-algebra × 2	0 projective-space
0 galois-theory × 2	0 ring-theory

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