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Shrugs's user avatar
Shrugs
  • Member for 2 years, 7 months
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4 votes
Accepted

$\# G - \# \text Z(G) = 46$. What is the value of $\text{ord}(G)$?

4 votes
Accepted

Doubt in Atiyah-Macdonald proposition 5.13

3 votes
Accepted

If two smooth cubic threefolds are birationally equivalent, are they isomorphic?

3 votes
Accepted

Blow-up of projective plane in three collinear points is not a del Pezzo surface

2 votes

Twist of Elliptic curve $E_D: Dy^2=x^3+ax+b$ is not isomorphic to $E:y^2=x^3+ax+b$?

2 votes
Accepted

Computing the presentation of a morphism of a $k$-algebras

2 votes
Accepted

An Incorrect Solution to Hartshorne Ex. III.5.5(c).

2 votes
Accepted

A product of curves is a minimal surface

1 vote
Accepted

Is there any general formula to calculate the order of elements in $U(n)$

1 vote
Accepted

Suppose $\mathcal{E}$ is a globally generated algebraic vector bundle on a scheme, then are there bounds on the number of generators needed?

1 vote
Accepted

Each element of affine open cover of a curve each of which containing the singular points meets every irreducible component?

1 vote
Accepted

Automorphisms of curves and Hurwitz-Riemann formula

1 vote

Let $f: N \rightarrow P$, $M$ faithfully flat iff $\alpha \otimes id_M = 0$

1 vote
Accepted

Pure submodule that is a direct summand

1 vote
Accepted

K3 surfaces: equivalent definitions

1 vote
Accepted

Is the global dimension of a polynomial ring in infinitely many indeterminates over a field infinite?

1 vote
Accepted

Generalized version of multiplicity of roots in the derivative.

1 vote
Accepted

About Proposition 7.2 of Atiyah Mcdonald

0 votes
Accepted

Is this sheaf cohomology group trivial?

0 votes

how to prove that a set is not algebraic

0 votes

Pushforward of pullback of a sheaf on $X\longrightarrow S$ via projections from $X\times_S X$