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Cohomology of quotient stack

ag.algebraic-geometry algebraic-stacks equivariant-cohomology

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Real (non-complex) Du Val singularities for quartics of high global Milnor number

ag.algebraic-geometry examples singularity-theory hypersurfaces

modified 20 mins ago YCor 46.1k

6

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4

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577

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Exact formula for $\chi(X, \, S^n \Omega^1_X)$

ag.algebraic-geometry reference-request complex-geometry chern-classes

answered 45 mins ago fewfold 131

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Matrix Equation with projection matrix

linear-algebra matrices matrix-analysis

asked 1 hour ago Apprentice 213

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Order of rotation matrix composition doesn't match with the definition of right-add in SO3

lie-groups lie-algebras

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3

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1

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103

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Question on integral expression of positive definite matrices

matrix-analysis

modified 1 hour ago markvs 1,276

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0

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9

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First hitting time for non-homogeneous diffusion martingale

stochastic-processes stochastic-differential-equations martingales

modified 1 hour ago GJC20 376

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40

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Geometric models for the classifying spaces of the spin and string covers of the orthogonal, symplectic, and symmetric groups

at.algebraic-topology homotopy-theory classifying-spaces

modified 1 hour ago Théo 5,670

4

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79

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Non identifiable polynomials

ag.algebraic-geometry rt.representation-theory polynomials projective-geometry grassmannians

modified 1 hour ago Arty 91

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Explicit description of the canonical $\pi_G: \mathrm{Sh}(G_0)\to B_S(\mathbf{G})$

ct.category-theory topos-theory locales internal-groupoids

modified 2 hours ago LSpice 6,301

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Are there finitely many primes $x$ such that for a fixed odd prime $p$, $n=x^{p-1}+x^{p-2}+\dotsb + x+1$ is composite and $x \mid \phi(n)$?

nt.number-theory prime-numbers congruences

modified 2 hours ago David Jones 257

57

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9

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21k

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When are probability distributions completely determined by their moments?

pr.probability it.information-theory

modified 2 hours ago Evidlo 3

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1

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54

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Does binary extension field multiplication matrix have random rows?

linear-algebra finite-fields

answered 2 hours ago Bobby Kleinberg 695

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Regularity of solution of wave eq. from regularity of Laplace eq. by Laplace transform

ap.analysis-of-pdes elliptic-pde regularity hyperbolic-pde wave-equation

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Cohomology of quotient stack

Real (non-complex) Du Val singularities for quartics of high global Milnor number

Exact formula for $\chi(X, \, S^n \Omega^1_X)$

Matrix Equation with projection matrix

Order of rotation matrix composition doesn't match with the definition of right-add in SO3

Question on integral expression of positive definite matrices

First hitting time for non-homogeneous diffusion martingale

Geometric models for the classifying spaces of the spin and string covers of the orthogonal, symplectic, and symmetric groups

Non identifiable polynomials

Explicit description of the canonical $\pi_G: \mathrm{Sh}(G_0)\to B_S(\mathbf{G})$

Are there finitely many primes $x$ such that for a fixed odd prime $p$, $n=x^{p-1}+x^{p-2}+\dotsb + x+1$ is composite and $x \mid \phi(n)$?

When are probability distributions completely determined by their moments?

Does binary extension field multiplication matrix have random rows?

Regularity of solution of wave eq. from regularity of Laplace eq. by Laplace transform

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