Robert S. Barnes

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network profile

866 reputation

210

bio	website	lxr.linux.no
	location	Jerusalem, Israel
	age	35
visits	member for	2 years, 1 month
	seen	May 8 at 18:00
stats	profile views	264

I'm a self taught programmer whose taken a break to go back to school and study Software Engineering. Currently, my main area's of interest are network programming and application level protocols, object oriented design and methodologies like Agile and TDD.

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77 Questions

views newest activity votes

2

votes

3

answers

224

views

Show that $A \setminus ( B \setminus C ) \equiv ( A \setminus B) \cup ( A \cap C )$

logic elementary-set-theory

oct 3 '11 at 4:22 yunone 10.8k

1

vote

1

answer

127

views

Images of Basis and the Representative Matrix

linear-algebra

may 12 at 22:04 Community♦ 1

1

vote

2

answers

61

views

Probability of a 12 symbol string containing 3 even digits

probability combinatorics

dec 30 at 10:21 copper.hat 28.5k

1

vote

1

answer

309

views

Probability of Picking sets of Colored Balls

probability combinatorics

dec 26 at 15:21 Robert S. Barnes 866

1

vote

3

answers

35

views

Showing dimV from existance of eigenvalues

linear-algebra eigenvalues eigenvectors

nov 6 at 20:47 Fly by Night 6,004

1

vote

3

answers

114

views

Change of Basis and Row Operations

linear-algebra

nov 4 at 10:42 copper.hat 28.5k

1

vote

2

answers

212

views

Eigenspaces of Symmetric Matrices

linear-algebra

oct 31 at 17:30 Logan 308

1

vote

3

answers

74

views

Differing definitions of the Characteristic Equation

linear-algebra

oct 15 at 9:47 Sean O'Brien 129

1

vote

1

answer

61

views

Orthogonality of row space and null space

linear-algebra

oct 14 at 9:07 Did 102k

1

vote

2

answers

74

views

Understanding of Derivatives via Limits

calculus limit derivatives

jul 15 at 19:05 Norbert 20k

1

vote

1

answer

220

views

Eigenvectors of a matrix and its diagonalization

linear-algebra

jun 25 at 7:02 Robert S. Barnes 866

1

vote

2

answers

77

views

Is the diagonalization of A Invertable?

linear-algebra matrices

jun 21 '12 at 7:40 talmid 1,248

1

vote

1

answer

113

views

$Sp(A)\bigoplus Sp(B) \Leftrightarrow A\cup B$ is linearly independent

linear-algebra

may 30 '12 at 13:09 rschwieb 20.7k

1

vote

2

answers

83

views

Finding $\dim(A_1 + A_2 +\cdots + A_n)$ [duplicate]

linear-algebra combinatorics inclusion-exclusion

may 22 '12 at 13:08 mt_ 3,978

1

vote

2

answers

152

views

Natural and formal languages

reference-request soft-question formal-languages propositional-calculus

mar 21 '12 at 11:13 Rachel 620

2

1

vote

2

answers

284

views

Proof that $(1-x)^n\cdot \left ( \frac{1}{1-x} \right )^n=1$

combinatorics generating-functions

mar 18 '12 at 16:20 Daniel Littlewood 2,638

1

vote

1

answer

57

views

Arranging 3 Rows of 4 letter as triplets with restrictions

combinatorics inclusion-exclusion

feb 14 '12 at 19:39 Community♦ 1

1

vote

1

answer

89

views

Generating Functions and the Negative Binom

combinatorics binomial-coefficients generating-functions

jan 16 '12 at 11:28 Robert S. Barnes 866

1

vote

1

answer

32

views

Min Number of Values from {1,2,…,9} Such that diff of 2 picked values is 5

combinatorics pigeonhole-principle

jan 8 '12 at 10:58 Patrick Da Silva 13.4k

1

vote

2

answers

472

views

How to Understand the Definition of Cardinal Exponentiation

elementary-set-theory cardinals

dec 8 '11 at 8:54 Asaf Karagila 90.7k

1

vote

2

answers

70

views

Show that $\tau(R_1 \cap R_2)\subseteq \tau(R_1)\cap\tau(R_2)$

elementary-set-theory

nov 24 '11 at 15:32 Martin Sleziak 20.3k

1

vote

3

answers

231

views

$[(A'\cup B) \cap (A\cup B')] \cap C = $?

elementary-set-theory

oct 23 '11 at 10:09 Tapu 2,726

1

0

votes

1

answer

54

views

A Recurrence relations of the form: $T(n) = aT(\frac{n}{b}) + f(n)$

recurrence-relations

feb 12 at 13:54 Paresh 636

0

votes

2

answers

60

views

50 States w/2 senators each. Probablity of various committee compositions

probability combinatorics

jan 1 at 14:29 Brian M. Scott 154k

0

votes

2

answers

164

views

Linear Operators, Representative Matrices and Change of Basis

linear-algebra

nov 10 at 3:19 Bruce Ikenaga 11

0

votes

1

answer

44

views

Question 4 A from Summer 2012 Exam Course 20109

homework linear-algebra

nov 9 at 7:56 copper.hat 28.5k

0

votes

1

answer

78

views

Cayley–Hamilton theorem and Similarity

linear-algebra

nov 7 at 11:48 Marc van Leeuwen 23.8k

0

votes

2

answers

47

views

Image of a Linear Operators Eigenspace

linear-algebra eigenvectors

nov 5 at 16:53 Cameron Buie 27.5k

0

votes

4

answers

177

views

$AA^T=A^TA$ and othogonallity of eigenvectors

linear-algebra eigenvectors

nov 2 at 8:56 Robert S. Barnes 866

0

votes

1

answer

50

views

Basis for the Null Space

linear-algebra

oct 24 at 9:35 joriki 92.5k

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