User wonderich

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242 views

Matrix representation of a 6-dimensional Lie algebra

asked Jan 29, 2016 at 16:55

2 votes

1 answer

530 views

Explicit examples of Milnor join $*$ construction

asked Oct 24, 2016 at 18:50

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0 answers

199 views

an "alternate derivation" of Poisson summation formula and discrete Fourier transformation

asked Jun 2, 2014 at 0:03

2 votes

0 answers

59 views

Notation and shorthand of cobordism G=O, SO, U

asked May 24, 2014 at 22:32

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0 answers

84 views

Oscillating modes with quickly exponential decay tails, solved from non-linear differential equations

asked Oct 4, 2017 at 6:05

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0 answers

90 views

Cover and extension of a Lie group

asked May 3, 2017 at 6:17

2 votes

0 answers

80 views

Reducing the spin bordism group to its Pontryagin dual of the torsion subgroup

asked Dec 18, 2016 at 17:47

2 votes

1 answer

82 views

Finite groups of order 24 in a special unitary Lie group

asked Apr 8, 2018 at 5:03

2 votes

1 answer

189 views

Lie group SU(n) and symmetric group S$_k$

asked Apr 9, 2018 at 2:24

2 votes

1 answer

105 views

Show that $\pi_1(SO(\infty))=\mathbb{Z}_2$ and $\pi_9(SO(\infty))=\mathbb{Z}_2$

asked Apr 27, 2017 at 22:19

2 votes

1 answer

71 views

Invariant subgroup in a self-conjugate pair multiplication in Unitary Group $U(3)$

asked Apr 26, 2018 at 3:13

2 votes

1 answer

227 views

Homogeneous space and nice manifolds

asked Jul 30, 2018 at 15:12

2 votes

1 answer

239 views

Projective Spin group and Spin$^C$ groups?

asked Sep 28, 2017 at 5:39

2 votes

1 answer

154 views

Stiefel-Whitney and Wu classes of $d$-manifold

asked Jul 19, 2018 at 22:16

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0 answers

48 views

The generators of $\Omega_{10}^{Pin^-}(pt)=\mathbb{Z}_{128} \times \mathbb{Z}_{8} \times \mathbb{Z}_{2}$

asked Jul 21, 2018 at 2:12

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0 answers

84 views

An integral formula and Poincaré duality

asked Jul 21, 2018 at 22:34

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1 answer

210 views

Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$

asked Jul 15, 2018 at 22:40

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6 answers

446 views

Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$ and $a+b=c+d$

asked Jul 16, 2018 at 20:44

1 vote

1 answer

441 views

Homogeneous space and quotient space for complex projective spaces

asked Jul 31, 2018 at 3:30

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0 answers

133 views

Thom space, homotopy group and cohomology group

asked Jul 30, 2018 at 2:33

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0 answers

45 views

Ordering of submanifolds in a $d$-sphere $S^d$ or $\mathbb{R}^d$

asked Jul 23, 2018 at 1:16

1 vote

1 answer

270 views

"2"-group cohomology

asked Jul 25, 2018 at 21:11

1 vote

1 answer

47 views

Invariant subgroup in a Hermitian self-conjugate pair multiplication in Unitary Group $U(3)$

asked Apr 26, 2018 at 18:34

1 vote

2 answers

190 views

$10^n+1$ as a product of consecutive primes

asked Apr 30, 2017 at 17:10

1 vote

1 answer

2k views

Short exact sequence and cohomology group

asked May 1, 2017 at 15:51

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0 answers

55 views

Generated a non-Abelian group from a Lie group and nontrivial $\mathbb{Z}_2$ action

asked Apr 10, 2018 at 16:44

1 vote

0 answers

54 views

Simple compact special unitary Lie group and dihedral group

asked Apr 13, 2018 at 5:37

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0 answers

24 views

Simple compact special unitary Lie group and dicyclic group Dic$_{k}$=Q$_{4k}$

asked Apr 13, 2018 at 5:51

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1 answer

84 views

Different expressions of $\mathbf{CP}^n$

asked Apr 25, 2018 at 5:05

1 vote

0 answers

127 views

Classifying spaces [related to Eilenberg–MacLane] for explicit group examples

asked May 21, 2018 at 14:52

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182 Questions

Matrix representation of a 6-dimensional Lie algebra

Explicit examples of Milnor join $*$ construction

an "alternate derivation" of Poisson summation formula and discrete Fourier transformation

Notation and shorthand of cobordism G=O, SO, U

Oscillating modes with quickly exponential decay tails, solved from non-linear differential equations

Cover and extension of a Lie group

Reducing the spin bordism group to its Pontryagin dual of the torsion subgroup

Finite groups of order 24 in a special unitary Lie group

Lie group SU(n) and symmetric group S$_k$

Show that $\pi_1(SO(\infty))=\mathbb{Z}_2$ and $\pi_9(SO(\infty))=\mathbb{Z}_2$

Invariant subgroup in a self-conjugate pair multiplication in Unitary Group $U(3)$

Homogeneous space and nice manifolds

Projective Spin group and Spin$^C$ groups?

Stiefel-Whitney and Wu classes of $d$-manifold

The generators of $\Omega_{10}^{Pin^-}(pt)=\mathbb{Z}_{128} \times \mathbb{Z}_{8} \times \mathbb{Z}_{2}$

An integral formula and Poincaré duality

Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$

Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$ and $a+b=c+d$

Homogeneous space and quotient space for complex projective spaces

Thom space, homotopy group and cohomology group

Ordering of submanifolds in a $d$-sphere $S^d$ or $\mathbb{R}^d$

"2"-group cohomology

Invariant subgroup in a Hermitian self-conjugate pair multiplication in Unitary Group $U(3)$

$10^n+1$ as a product of consecutive primes

Short exact sequence and cohomology group

Generated a non-Abelian group from a Lie group and nontrivial $\mathbb{Z}_2$ action

Simple compact special unitary Lie group and dihedral group

Simple compact special unitary Lie group and dicyclic group Dic$_{k}$=Q$_{4k}$

Different expressions of $\mathbf{CP}^n$

Classifying spaces [related to Eilenberg–MacLane] for explicit group examples