User Zach Teitler

6 votes

Accepted

Very general quartic hypersurface in $\mathbb{P}^3$ has Picard group $\mathbb{Z}$

answered Dec 2, 2020 at 17:11

6 votes

Zorn's lemma: old friend or historical relic?

answered Dec 12, 2022 at 21:51

6 votes

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What is the minimum number of multiplications for $2\times 3$ and $3\times 2$ multiplication?

answered May 6, 2022 at 7:06

6 votes

Most elementary proof showing that exponential growth wins against polynomial growth

answered Nov 5, 2023 at 16:40

5 votes

Are "transverse" hyperplane sections of nondegenerate irreducible projectice varieties always nondegenerate

answered Nov 14, 2021 at 3:18

5 votes

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Ideals: If $\langle f_1,f_2 \rangle = \langle g_1,g_2 \rangle$, then $\langle f_1-\lambda,f_2-\mu \rangle = \langle g_1-\delta,g_2-\epsilon \rangle$?

answered Aug 30, 2023 at 14:15

5 votes

Reference request: A multidimensional generalization of the fundamental theorem of calculus

answered Jan 13, 2021 at 16:52

5 votes

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Naive question on tensor product

answered Oct 7, 2020 at 9:15

5 votes

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Symmetric tensor decomposition

answered Aug 20, 2019 at 3:22

5 votes

Mathematical podcasts/audio

answered Apr 27, 2020 at 6:12

5 votes

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Combinatorial proof of identity

answered Dec 27, 2017 at 11:11

5 votes

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A seemingly Groebnerizable problem

answered Apr 18, 2018 at 19:29

5 votes

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Number of sets containing some given sets of fixed cardinality

answered Apr 8, 2017 at 2:23

4 votes

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Question about properties of affine varieties defined by bihomogeneous polynomials

answered Mar 19, 2017 at 20:22

4 votes

Complexity of a polynomial

answered Dec 26, 2017 at 2:06

4 votes

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Can the degree of an affine variety increase after intersecting with a hyperplane?

answered Feb 14, 2020 at 2:40

4 votes

Examples of math hoaxes/interesting jokes published on April Fool's day?

answered Apr 1, 2020 at 14:15

4 votes

Hard implications that become easy with the right intermediate step

answered Apr 15, 2019 at 6:51

4 votes

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System of polynomial equations with a known root

answered Dec 12, 2018 at 5:40

4 votes

Accepted

Condition for a monomial to belong to a particular ideal

answered Aug 5, 2019 at 14:15

4 votes

Accepted

Configuration of points on a plane curve

answered Feb 4, 2021 at 7:45

4 votes

Accepted

Polynomial as a sum of powers of linear forms (with restrictions)

answered May 19, 2021 at 3:18

4 votes

Dimension of a general partial derivative of a linear subspace of polynomials

answered Oct 16, 2022 at 0:01

3 votes

There is a nice theory of quadratic forms. How about cubic forms, quartic forms, quintic forms, ...?

answered Sep 15, 2022 at 17:53

3 votes

Accepted

Modulo $x^2 + y^2 - 1$, is every homogeneous polynomial that is a square of a polynomial, necessarily of sum of squares of homogeneous polynomials?

answered Mar 30, 2023 at 20:30

3 votes

A non-example of a graded Frobenius algebra

answered Sep 21, 2023 at 15:23

3 votes

Taking a theorem as a definition and proving the original definition as a theorem

answered Sep 28, 2021 at 0:09

3 votes

Accepted

Is the pre-closure of the join of two projective varieties quasi-projective?

answered Apr 18, 2021 at 8:36

3 votes

Sum of initial ideals

answered Oct 23, 2018 at 7:31

3 votes

Betti numbers of a Cohen-Macaulay Module in small projective dimension

answered Aug 24, 2018 at 13:04

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108 Answers

Very general quartic hypersurface in $\mathbb{P}^3$ has Picard group $\mathbb{Z}$

Zorn's lemma: old friend or historical relic?

What is the minimum number of multiplications for $2\times 3$ and $3\times 2$ multiplication?

Most elementary proof showing that exponential growth wins against polynomial growth

Are "transverse" hyperplane sections of nondegenerate irreducible projectice varieties always nondegenerate

Ideals: If $\langle f_1,f_2 \rangle = \langle g_1,g_2 \rangle$, then $\langle f_1-\lambda,f_2-\mu \rangle = \langle g_1-\delta,g_2-\epsilon \rangle$?

Reference request: A multidimensional generalization of the fundamental theorem of calculus

Naive question on tensor product

Symmetric tensor decomposition

Mathematical podcasts/audio

Combinatorial proof of identity

A seemingly Groebnerizable problem

Number of sets containing some given sets of fixed cardinality

Question about properties of affine varieties defined by bihomogeneous polynomials

Complexity of a polynomial

Can the degree of an affine variety increase after intersecting with a hyperplane?

Examples of math hoaxes/interesting jokes published on April Fool's day?

Hard implications that become easy with the right intermediate step

System of polynomial equations with a known root

Condition for a monomial to belong to a particular ideal

Configuration of points on a plane curve

Polynomial as a sum of powers of linear forms (with restrictions)

Dimension of a general partial derivative of a linear subspace of polynomials

There is a nice theory of quadratic forms. How about cubic forms, quartic forms, quintic forms, ...?

Modulo $x^2 + y^2 - 1$, is every homogeneous polynomial that is a square of a polynomial, necessarily of sum of squares of homogeneous polynomials?

A non-example of a graded Frobenius algebra

Taking a theorem as a definition and proving the original definition as a theorem

Is the pre-closure of the join of two projective varieties quasi-projective?

Sum of initial ideals

Betti numbers of a Cohen-Macaulay Module in small projective dimension