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Manos
  • Member for 10 years, 11 months
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20 votes

Structure of ideals in the product of two rings

39 votes
Accepted

Real life applications of Topology

6 votes

Hartshorne Lemma II.5.3 Proof

0 votes

Hartshorne Corollary III.9.4

3 votes
Accepted

If $P \in \operatorname{Supp}(M)$ prove that $P$ contains a prime ideal $Q$ with $Q \in \operatorname{Ass}_R(M)$.

0 votes

Is $\operatorname{height} \mathfrak{p} + \dim A / \mathfrak{p} = \dim A$ true?

2 votes

What is a simple definition of the pullback of a section?

9 votes

Idempotents in a local ring

7 votes
Accepted

Hartshorne Ex. II 1.16 b) Flasque sheaves and exact sequences

35 votes
Accepted

Show that the direct sum of a kernel of a projection and its image create the originating vector space.

4 votes
Accepted

Hilbert polynomial for a dimension zero projective variety by taking an affine chart

4 votes

Localisation is isomorphic to a quotient of polynomial ring

1 vote
Accepted

Quotient of a polynomial ring and leading terms

2 votes

exact sequence of ideal sheaves (Hartshorne Theorem III.3.7)

3 votes
Accepted

Find the associated primes of $(x_0) \cdot (x_0, x_1) \cdot \dots \cdot (x_0, \dots, x_r)$ in $k[x_0, \dots x_r]$

3 votes

Proposition II.$3.2$ in Hartshorne

5 votes
Accepted

Nilradical of a graded ring

1 vote
Accepted

map of tangent spaces surjective on an open set

25 votes
Accepted

Union of preimages and preimage of union

1 vote
Accepted

Height of Product of Ideals

2 votes
Accepted

Dimension of graded module

2 votes
Accepted

Exercise $2$ from chapter $5$ of Eisenbud's Geometry of Syzygies book

3 votes
Accepted

Vector Space as Ideal modulo Ideal?

1 vote
Accepted

Exact sequence of graded modules and localization

3 votes
Accepted

General procedure to prove something is a tensor product of modules

3 votes
Accepted

localized at associated prime of an ideal

1 vote
Accepted

Where could I learn basic math terminology?

1 vote

Motivation for rings of fractions?

1 vote

using smoothness to deduce reducedness

2 votes
Accepted

the ideal generated by general polynomials is radical

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