User Martin - Mathematics Stack Exchange

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	1,213 reputation	bio	website		visits	member for	2 years, 6 months
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kviews

Mathematical precise definition of a PDE being elliptic, parabolic or hyperbolic

pde

aug 21 at 1:13 doraemonpaul 3,031

9

17

votes

1

answer

678

views

A smooth function's domain of being non-analytic

real-analysis analysis

jan 11 at 3:03 kahen 8,064

1

7

votes

2

answers

627

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Dual of Sobolev space $W^{1,p}(U)$ for $U$ an arbitrary subset of $\mathbb R^n$

functional-analysis distribution-theory

dec 16 '10 at 18:25 Jose27 1,737

5

6

votes

2

answers

343

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Topologies on the space $\mathcal D'(U)$ of distributions

functional-analysis distribution-theory

nov 12 '11 at 5:57 t.b. 43.2k

5

votes

2

answers

295

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On the isometry between bounded linear operators and the dual of nuclear linear operators

functional-analysis operator-theory hilbert-spaces compact-operators trace

may 11 at 12:26 Martin 3,688

5

votes

1

answer

219

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Completeness of BMO without duality to $H^1$

harmonic-analysis banach-spaces

sep 4 at 16:40 Jonas Teuwen 6,871

5

votes

0

answers

117

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Two “different” adjoints of exterior derivative on manifolds with boundary in the $L^2$-setting

functional-analysis operator-theory differential-forms

jul 21 '11 at 13:47 Martin 1,213

1

5

votes

2

answers

264

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'Equivalent' Exhaustion by compact sets

general-topology

nov 17 '10 at 10:24 Martin 1,213

4

votes

1

answer

40

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If A $\subset S^n$ has spherical diameter < $\pi$, then $S^n - A$ contains a closed semisphere.

geometry

jan 27 at 15:03 Christian Blatter 32.6k

4

votes

2

answers

409

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Realification and Complexification of vector spaces

linear-algebra reference-request vector-spaces

dec 17 at 19:41 Oleg 11

2

4

votes

1

answer

302

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(Question) on Time-dependent Sobolev spaces for evolution equations

pde

sep 5 at 22:12 doraemonpaul 3,031

2

4

votes

2

answers

125

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Can metric properties can be expressed in category theoretical terms?

analysis functional-analysis category-theory

nov 11 '11 at 11:11 t.b. 43.2k

2

4

votes

1

answer

144

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Why weak formulations in numerical mathematics?

numerical-methods calculus-of-variations

jul 10 '11 at 17:54 eudoxos 279

4

votes

2

answers

359

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On distributions over $\mathbb R$ whose derivatives vanishes

analysis distribution-theory

mar 20 '11 at 12:52 Martin 1,213

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4

votes

1

answer

231

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How to define the derivative of Radon measures

analysis measure-theory functional-analysis topological-vector-spaces

jan 14 '11 at 20:38 Martin 1,213

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4

votes

1

answer

146

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Finest topology on a space of banach space operators

functional-analysis topological-vector-spaces

dec 22 '10 at 21:16 Jonas Meyer 35k

1

4

votes

2

answers

320

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Intuition for not-so-smooth manifolds

intuition differential-topology manifolds

dec 17 '10 at 1:56 Ryan Budney 13.3k

3

4

votes

2

answers

434

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Distinction between 'adjoint' and 'formal adjoint'

terminology functional-analysis

dec 3 '10 at 12:39 Willie Wong♦ 30.7k

3

votes

2

answers

180

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Geometric properties of a $d$-dimensional simplex in euclidean space

geometry reference-request polytopes

feb 27 at 1:27 Community♦ 1

3

votes

2

answers

288

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Proof of $f = g \in L^1_{loc}$ if $f$ and $g$ act equally on $C_c^\infty$

functional-analysis

dec 12 at 3:25 Giuseppe Negro 4,775

3

votes

1

answer

188

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The real part treated like an angle in complex vector spaces

functional-analysis vector-spaces complex-numbers

mar 19 '12 at 12:58 Giuseppe Negro 4,775

3

votes

2

answers

279

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Paradox or Error: On the inclusion of dense subspaces into Hilbert spaces

functional-analysis hilbert-spaces sobolev-spaces

nov 14 '11 at 4:24 t.b. 43.2k

2

3

votes

0

answers

371

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List of mathematical Summer schools (particulary in Europe)

soft-question education

apr 8 '11 at 14:55 Martin 1,213

2

3

votes

2

answers

320

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Why are translation invariant operators on $L^2$ multiplier operators

functional-analysis fourier-analysis harmonic-analysis

apr 4 '11 at 9:10 Matthew Daws 1,388

3

votes

1

answer

1

kviews

When is the image of a linear operator closed?

functional-analysis

mar 10 '11 at 0:24 Jonas Meyer 35k

3

votes

2

answers

405

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Proof that Frechet-metric generates same topology as the semi-norms

functional-analysis

nov 17 '10 at 9:25 Jonas Meyer 35k

1

2

votes

1

answer

221

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Well-posedness of the Poisson problem with mixed boundary conditions

functional-analysis pde

may 1 at 5:59 Community♦ 1

2

votes

0

answers

55

views

fundamental theorem of linear inequalities

optimization linear-programming

mar 20 at 11:04 Martin 1,213

2

votes

3

answers

45

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What can be said about the minimizer of $\| b - A x \| ^2+ \| x \|^2$?

linear-algebra

mar 7 at 18:12 dineshdileep 2,141

2

votes

2

answers

91

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Approaches to integrate $\int_0^1 \frac{x}{\sqrt{a+bx+cx^2}} dx$

integral

jan 29 at 22:19 André Nicolas 161k

Martin

67 Questions