User angry twat - Mathematics Stack Exchange

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30

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An alternate proof of Egorov's Theorem

real-analysis measure-theory

5h ago angry twat 1,296

0

votes

1

answer

37

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Help me solve the invariant measure of $Q$

probability-theory stochastic-processes

26m ago Did 103k

1

vote

1

answer

45

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Help me solve this recurrence relation

sequences-and-series recurrence-relations

14h ago Goos 1,254

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0

answers

37

views

Why are call options necessary?

finance

2d ago angry twat 1,296

0

votes

1

answer

35

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Understanding this Poisson Queueing Process

probability queueing-theory

2d ago Did 103k

3

votes

1

answer

45

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The semifinite portion of a measure $\mu$

measure-theory

may 17 at 20:22 Martin 3,780

1

vote

1

answer

36

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Counterexample to upper continuity

real-analysis measure-theory

may 15 at 12:17 Adam Saltz 1,203

1

vote

0

answers

31

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Questions regarding the use of Index Calculus for finite fields and elliptic curves

number-theory cryptography

may 11 at 19:54 angry twat 1,296

1

vote

1

answer

37

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Hidden Markov Model Coin Toss Problem

probability markov-chains

may 1 at 21:00 Did 103k

1

4

votes

2

answers

79

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Prove that a random walk on $\mathbb{Z}_+\cup \{0\}$ is transient

probability stochastic-processes markov-chains random-walk

apr 27 at 12:56 Byron Schmuland 15.4k

-1

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0

answers

80

views

Prove that RSA is susceptible to a chosen ciphertext attack [closed]

number-theory cryptography

apr 20 at 22:49 angry twat 1,296

1

2

votes

2

answers

106

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Show that the countable product of metric spaces is metrizable

real-analysis general-topology metric-spaces

apr 16 at 6:33 Henno Brandsma 9,842

3

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1

answer

63

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Let $(X,\large\tau)$ be a normal topology, then show that the weak topology induced by the cont. real-valued functions on $X$ is $\large\tau$

real-analysis general-topology

apr 14 at 4:13 Arthur Fischer♦ 21.3k

3

votes

2

answers

61

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Given that $(X_n)_{n\geq 0}$ is a Markov Chain, prove that $(X_{kn})_{n\geq 0}$ is a Markov Chain

probability markov-chains

apr 8 at 8:42 Donkey_2009 1,748

0

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2

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48

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Let $\mathfrak{m}$ be maximal in $R$. Show that $\mathfrak{m}^n/\mathfrak{m}^{n+1}$ is an $R/\mathfrak{m}$-vector space for all $n\geq 0$

abstract-algebra ring-theory ideals

mar 26 at 20:33 Martin Brandenburg 23k

2

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0

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75

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For a family of functions $F\subset C(X)$ in the metric space $(C(X),d)$, if $F$ is compact on compact subsets of $X$, then $F$ is compact on $X$

real-analysis metric-spaces compactness

mar 25 at 16:53 Davide Giraudo 56.3k

1

vote

1

answer

89

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Prove that the closed unit ball of $L^2[a,b]$ is closed in $L^1[a,b]$

real-analysis normed-spaces lp-spaces

mar 23 at 17:25 Matt N. 15.3k

3

votes

0

answers

52

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Why is the Euclidean metric called the prime at infinity?

soft-question notation p-adic-number-theory

mar 20 at 6:39 angry twat 1,296

2

votes

2

answers

60

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Prove that the sequence satisfying $a^{p^n}\equiv a^{p^{n-1}}$mod $p^n$ for $n\geq 1$, converges to the Teichmuller Representative

number-theory p-adic-number-theory

mar 5 at 6:52 anon 40.3k

1

vote

2

answers

77

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Prove that $\displaystyle\mathbb{Q}_p$ always contains $p$ solutions to the equation $x^p-x=0$

number-theory p-adic-number-theory

mar 2 at 8:36 fretty 3,908

2

votes

2

answers

94

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Is the set of integers with respect to the p-adic metric compact?

number-theory compactness p-adic-number-theory

mar 1 at 10:38 Asaf Karagila 91.6k

1

4

votes

2

answers

74

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Prove that $\displaystyle\prod_{q\in \mathbb{Q}^{\times}}|q|=1$

analysis infinite-product

feb 22 at 7:17 Zev Chonoles 54k

2

votes

2

answers

265

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Complex Analytic Proof of the Gaussian Integral $\int_{-\infty}^{\infty}e^{-z^2}dz=\sqrt{\pi}$

complex-analysis residue-calculus

feb 17 at 5:04 Abhra Abir Kundu 3,457

1

vote

1

answer

82

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The Group of points on the Elliptic curve $y^2=x^3+1$ over $\mathbb{F}_5$

elliptic-curves

feb 15 at 23:00 Bruno 7,119

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4

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4

answers

226

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Using the Residue Theorem for a contour integral along the Riemann sphere

complex-analysis residue-calculus

may 7 at 17:27 John Dilinger 11

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3

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1

answer

81

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Proving a group isomorphism from $(S,+)$ to $(S,+')$

abstract-algebra group-theory

jan 30 at 17:19 David Wheeler 1,190

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2

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106

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Given an algebraic curve $F(x,y)=0$, why do the partial derivatives of $F(x,y)$ being zero at a point imply the plane curve has a singularity?

analytic-geometry algebraic-curves

jan 21 at 20:02 Lubin 5,996

2

votes

1

answer

79

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Show that the rational conic $F(x,y)=ax^2+bxy+cy^2+dx+ey+f$, subject to a certain condition, is non-singular

abstract-algebra

jan 20 at 19:35 angry twat 1,296

2

votes

1

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69

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The Process of Choosing Projective Axes to Put an Elliptic Curve into Weierstrass Normal Form

geometry elliptic-curves projective-geometry

jan 12 at 2:38 Community♦ 1

0

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1

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75

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Let $F(x,y)=1$ for $x+y\ge 0$ and be zero otherwise. Show that $F$ cannot possibly be the joint distribution function of a pair of random variables.

probability probability-theory probability-distributions random-variables

jan 2 at 22:27 Did 103k

angry twat

92 Questions