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May
5
answered what is the precise definition of a morphism defined over $k$?
May
4
comment A confusion on the definition of morphism between varieties
I believe the answer to your question might be Lemma I.3.6 in Hartshorne.
Apr
23
answered Number of inflection points of an algebraic projective curve
Apr
22
answered Are points in general position generic points?
Apr
22
comment Every variety contains open affine normal subvariety
@DanielMcLaury: Good point, fixed.
Apr
22
revised Every variety contains open affine normal subvariety
added 13 characters in body
Apr
21
revised $\Bbb K$-algebra structure on isomorphic vector space
deleted 14 characters in body; edited title
Apr
21
answered Every variety contains open affine normal subvariety
Apr
21
revised Is the preimage of the non-normal locus a divisor?
edited tags
Apr
21
comment Is the preimage of the non-normal locus a divisor?
@AsalBeagDubh: A very good nitpick, I fixed that.
Apr
21
revised Is the preimage of the non-normal locus a divisor?
deleted 37 characters in body
Apr
21
asked Is the preimage of the non-normal locus a divisor?
Apr
20
comment Multiplicity of point as a zero of polynomial.
Also, how do you define $I_p(C,L)$?
Apr
19
answered Example such that $ f_1(x)$ is reducible but $f(x)$ is irreducible.
Apr
15
answered Show that a variety is irreducible
Apr
13
answered Residue class field of coordinate ring
Mar
19
comment Are unipotent algebraic groups connected?
this answer on mathoverflow strongly suggests that your argument is solid.
Mar
16
comment An isomorphism from $GL_{2}(\mathbb{F_{2}})$ to $S_{3}$
These two groups are not isomorphic. $\operatorname{GL}_3(\mathbb F_2)$ has at least $7$ elements, because there are $7$ nonzero vectors in $\mathbb F_2^3$. On the other hand, $S_3$ only contains $6$ elements.
Mar
16
answered Looking for a proof that the resultant is the product of the differences of roots
Mar
13
accepted Do rational functions separate points?