User LevDub - Mathematics Stack Exchange

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9

votes

4

answers

110

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How do extension fields implement $>, <$ comparisons?

mar 16 at 16:53 Pete L. Clark 44.4k

1

6

votes

1

answer

52

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Can the rank of the homology group of an abstract simplicial complex be computed in polynomial time?

computer-science computational-complexity homotopy-theory

apr 27 at 13:41 zyx 10.9k

5

votes

2

answers

47

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Find the most vertical line in a point set in $O(n \log n)$ time

homework geometry computer-science computational-geometry

mar 14 at 23:49 Michael Biro 1,493

1

5

votes

1

answer

81

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Is there a simple proof of Borsuk-Ulam, given Brouwer?

geometry fixed-point-theorems combinatorial-geometry

mar 7 at 23:23 Dejan Govc 5,549

5

votes

3

answers

96

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Why aren't probability measures required to use $2^X$ as the underlying $\sigma$-algebra?

probability measure-theory probability-theory

dec 26 at 13:26 Michael Greinecker 12.4k

1

5

votes

0

answers

86

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When is $\{ x | f(x) \le 0\}$ path-connected?

general-topology connectedness

oct 8 at 16:39 LevDub 743

3

votes

1

answer

30

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Given $\alpha, \beta \in \bar{F}$ are separable over $F$, prove that $\alpha + \beta$ is also separable over $F$.

homework abstract-algebra

mar 27 at 4:39 Frank McGovern 1,519

3

votes

2

answers

65

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What proof techniques show that this polynomial is irreducible?

homework abstract-algebra

mar 6 at 4:10 Community♦ 1

1

3

votes

0

answers

36

views

Find a density function for the endpoint of this stochastic process

probability-distributions stochastic-processes stochastic-calculus

jan 7 at 7:36 LevDub 743

1

3

votes

1

answer

65

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Find the transition function of this stochastic process

probability-distributions stochastic-processes stochastic-calculus

jan 6 at 11:24 Did 102k

3

votes

0

answers

41

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Is this a valid method for time-integrating a stochastic process?

probability probability-distributions stochastic-processes stochastic-calculus

jan 3 at 20:35 LevDub 743

1

3

votes

2

answers

152

views

Generalizing the Catalan Numbers

combinatorics catalan-numbers

nov 11 at 8:27 EuYu 15.2k

3

votes

3

answers

169

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When a directed graph is represented in matrix form, what is the interpretation of the inverse of this matrix?

matrices graph-theory

oct 11 at 22:05 EuYu 15.2k

2

votes

1

answer

73

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Integrating a Brownian Bridge conditioned above a linear boundary

brownian-motion stochastic-integrals

may 3 at 19:47 Jean-Sébastien 2,257

1

2

votes

2

answers

53

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What is a good way to simplicize the integer lattice?

geometry integer-lattices simplicial-stuff triangulation

apr 20 at 5:08 coffeemath 6,538

2

votes

1

answer

28

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What's the relationship between the Ham Sandwich Theorem and the PPAD Complexity Class?

geometry computational-complexity

mar 5 at 2:40 Colin McQuillan 3,062

2

votes

1

answer

33

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When is the complement of a diophantine set in the naturals also diophantine?

diophantine-equations computability

feb 10 at 22:52 André Nicolas 160k

2

votes

3

answers

78

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How can we expand a matrix while maintaining the entries of its inverse?

linear-algebra matrices

feb 5 at 11:05 user1551 16.6k

2

votes

0

answers

103

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Geometric interpretations of matrix inverses

linear-algebra geometry matrices

feb 5 at 8:10 zyx 10.9k

1

2

votes

2

answers

51

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How does a normal vector change with respect to the points that define it?

linear-algebra geometry matrices

jan 27 at 20:13 Rahul Narain 16.9k

2

votes

1

answer

40

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Is there a standard procedure for conditioning a stochastic process?

stochastic-processes

jan 8 at 8:22 Did 102k

2

votes

1

answer

116

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Help understanding the Feynman-Kac formula

probability-distributions stochastic-processes pde stochastic-integrals

nov 12 at 22:39 doraemonpaul 3,021

2

votes

0

answers

28

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Determining whether a path must pass through a given set

general-topology connectedness

oct 7 at 20:38 LevDub 743

2

votes

1

answer

39

views

What sort of figure does a linear combination of squared variables form?

linear-algebra

sep 23 at 19:14 Robert Israel 86.1k

2

votes

2

answers

93

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Can we solve for $a$ in $b(x) =\int_{-\infty}^\infty b(s)a(x,s)ds$

integral-transforms integral-equations

jul 14 at 20:19 Alex 4,394

1

vote

0

answers

18

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Basic questions about convex optimization

reference-request convex-optimization

apr 26 at 17:27 LevDub 743

1

vote

0

answers

24

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A question about partitioning the unit cube into simplexes

geometry simplicial-stuff

apr 24 at 7:19 LevDub 743

1

vote

2

answers

31

views

Why is an antipodal-symmetrically colored circle guaranteed to have an odd number of multicolored edges?

combinatorics combinatorial-geometry

mar 27 at 22:25 Brian M. Scott 154k

1

vote

1

answer

54

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Why is convexity a requirement for Brouwer fixed points? Shouldn't “no holes” be good enough?

fixed-point-theorems

mar 7 at 18:18 Damien L 3,424

1

vote

1

answer

39

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Rephrasing a Stochastic Process as a Stochastic Differential Equation

stochastic-processes stochastic-integrals stochastic-calculus

mar 2 at 18:19 Nick 21

LevDub

64 Questions