User Taxi Driver - Mathematics Stack Exchange

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	7,213 reputation	bio	website		visits	member for	1 year, 3 months
1627 badges		location	Brazil		seen	5 hours ago

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How to construct a $2\times 2$ real matrix A not equal to Identity such that $A^3$=I?

matrices ring-theory

aug 15 at 7:22 Babak S. 27.2k

1

5

votes

6

answers

266

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$f:X\rightarrow Y$ is a continuous surjection, $X$ and $Y$ are topological space

general-topology

jul 13 at 7:42 BenjaLim 16.7k

1

5

votes

4

answers

204

views

A $C^{\infty}$ function from $\mathbb{R}^2$ to $\mathbb{R}$

differential-geometry

jun 22 '12 at 9:40 JBC 1,346

3

5

votes

1

answer

304

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Eigenvalues of $A+B$

linear-algebra matrices eigenvalues

jun 7 '12 at 10:28 Willie Wong♦ 30.6k

2

5

votes

1

answer

171

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product of hermitian and unitary matrix

linear-algebra general-topology matrices metric-spaces

may 2 '12 at 19:16 Martin Argerami 16.8k

2

5

votes

1

answer

142

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does there exist a discrete set whose image is dense

real-analysis

apr 25 '12 at 7:53 Patrick Da Silva 13.3k

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4

votes

3

answers

79

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$\mathbb{Q}/\mathbb{Z}$ has cyclic subgroup of every positive integer $n$? [duplicate]

abstract-algebra group-theory

may 14 at 16:36 Seirios 8,802

4

votes

4

answers

253

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Uniqueness theorem for harmonic function

complex-analysis

may 9 at 6:35 Bobby Ocean 66

1

4

votes

2

answers

80

views

Automorphism group any bounded domain of $\mathbb{C}$

complex-analysis lie-groups complex-geometry

mar 8 at 16:44 Georges Elencwajg 44.8k

1

4

votes

1

answer

71

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orbits are open in Manifold ? group action on manifold.

differential-geometry manifolds differential-topology

mar 6 at 14:29 Georges Elencwajg 44.8k

4

votes

1

answer

68

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Proving that the smooth automorphism group of a manifold $M$ acts transitively on $M$

manifolds differential-topology

mar 6 at 6:11 Community♦ 1

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4

votes

1

answer

46

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$\dim$ $C(X,\mathbb{R})<\infty$ we need to show $|X|<\infty$,

linear-algebra general-topology

feb 7 at 12:50 Davide Giraudo 56k

2

4

votes

3

answers

144

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subgroup of order $11$ lies inside $Z(G).$

abstract-algebra finite-groups

feb 7 at 7:24 m. k. 7,307

4

votes

5

answers

126

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how to show $f(1/n)$ is convergent?

real-analysis

jan 13 at 18:56 Community♦ 1

4

votes

1

answer

67

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How to show that $p_n$ converges uniformly to $\sin x$

real-analysis

jan 13 at 9:17 Amr 8,788

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4

votes

2

answers

128

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image of continuous function is compact and connected.

general-topology

nov 23 at 10:36 Ittay Weiss 18.5k

2

4

votes

1

answer

59

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graph is dense in $\mathbb{R}^2$

real-analysis

nov 2 at 9:35 Gerry Myerson 85.7k

4

votes

1

answer

126

views

Representation of Lie algebra of $\textrm{SU}(2)$

representation-theory lie-algebras

oct 16 at 2:34 BenjaLim 16.7k

1

4

votes

1

answer

175

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Is this metric space complete?

metric-spaces

jul 22 at 14:13 Pete L. Clark 44.3k

1

4

votes

3

answers

92

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continuous function from $D\setminus \{0\}$ to subset of $\mathbb{R}$

general-topology

jul 21 at 17:17 Ben Millwood 3,687

4

votes

1

answer

116

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connected component of $\rm{GL_n}(\mathbb{R})$ [duplicate]

general-topology

jul 17 at 9:54 joriki 92.2k

4

votes

3

answers

193

views

which of the following metric spaces are separable?

general-topology functional-analysis metric-spaces

jul 12 at 22:39 BenjaLim 16.7k

2

4

votes

1

answer

173

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which of the following metric spaces are complete?

metric-spaces

jul 11 at 23:50 Asaf Karagila 90.2k

1

4

votes

1

answer

88

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Polynomial of same degree

complex-analysis polynomials

jun 24 at 15:26 Davide Giraudo 56k

4

votes

1

answer

146

views

How to show that $f$ is an odd function?

complex-analysis

jun 14 '12 at 14:38 DonAntonio 46.2k

4

votes

1

answer

207

views

Point set topology question: compact Hausdorff topologies

general-topology

jun 4 '12 at 20:34 Matt N. 15.2k

2

3

votes

2

answers

37

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geometric multiplicity= algebraic multiplicity for a symmetric matrix

linear-algebra

may 16 at 5:01 Daved 266

3

votes

4

answers

98

views

There does not exist an entire function which satisfies $f({1\over n})={1\over 2^n}$?

complex-analysis

may 15 at 19:39 Christian Blatter 32.3k

3

votes

2

answers

135

views

$A^3+A=0$ We need to show $\mathrm{rank}(A)=2$

linear-algebra

may 13 at 7:48 Taxi Driver 7,213

3

votes

3

answers

117

views

how to show image of a non constant entire function is dense in $\mathbb{C}$?

complex-analysis

may 9 at 17:38 ROBINSON 580

Taxi Driver

456 Questions