User Xuan Huang - Mathematics Stack Exchange

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	229 reputation	bio	website		visits	member for	10 months
11 badges		location			seen	Dec 16 '12 at 22:06

2

3

votes

2

answers

188

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Limit of a continuous function

calculus limit

jan 11 at 20:59 Byron Schmuland 15.4k

2

votes

2

answers

263

views

Sphere on plane

geometry

dec 16 at 22:20 Xuan Huang 229

3

votes

5

answers

207

views

Mixing things- ratios

algebra-precalculus

dec 16 at 22:12 Xuan Huang 229

0

votes

2

answers

97

views

Latin squares of even order-sub squares

combinatorics latin-square

dec 11 at 20:02 Noah Snyder 4,316

1

0

votes

2

answers

131

views

$k$ hands in $n$'s hair

combinatorics prime-numbers modular-arithmetic contest-math

dec 11 at 13:02 robjohn♦ 60.1k

1

2

votes

2

answers

476

views

Rotating equilateral triangles

geometry contest-math

dec 10 at 14:06 robjohn♦ 60.1k

1

vote

2

answers

151

views

Sudoku of different sizes

combinatorics

dec 9 at 20:31 Xuan Huang 229

3

votes

1

answer

111

views

Summation mod$ (2^{16} +1)$

prime-numbers modular-arithmetic

sep 26 at 6:37 Douglas S. Stones 11.4k

1

vote

1

answer

97

views

Ranking integers

combinatorics

sep 7 at 13:01 Community♦ 1

0

votes

3

answers

764

views

Equation of a plane equidistant from two points $A$ and $B$?

homework vector-spaces

aug 29 at 15:01 user38034 775

0

votes

1

answer

64

views

Distance from a point in $\mathbb{R}^3$ to x-axis

homework vector-spaces

aug 29 at 13:57 user29999 1,755

2

votes

1

answer

173

views

Turning affine planes into projective planes

combinatorics geometry projective-geometry latin-square affine-geometry

aug 18 at 16:56 Community♦ 1

4

votes

3

answers

123

views

Consider a card game-parity

combinatorics game-theory combinatorial-game-theory card-games

aug 15 at 6:20 uncookedfalcon 2,499

2

votes

1

answer

63

views

Latin squares of even order with all cells only participating in one subsquare.

combinatorics group-theory field-theory finite-fields latin-square

aug 9 at 7:33 Douglas S. Stones 11.4k

0

votes

2

answers

59

views

Can we find two mutually orthogonal diagonal latin squares of orders $4$ and $8$?

combinatorics latin-square

jul 27 at 10:55 Jyrki Lahtonen 31k

1

vote

1

answer

82

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No pandiagonal latin squares with order divisible by 3?

combinatorics elementary-number-theory latin-square

jul 27 at 9:37 Jyrki Lahtonen 31k

0

votes

1

answer

279

views

k-edge-connected graph- proof

graph-theory

jul 21 at 14:09 Douglas S. Stones 11.4k

3

votes

1

answer

52

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q-ary code/Latin squares

combinatorics coding-theory latin-square binary

jul 21 at 9:00 Gerry Myerson 86k

0

votes

1

answer

42

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Could you show me an example of an order 7 pandiagonal latin square?

combinatorics finite-fields latin-square

jul 20 at 5:34 Jyrki Lahtonen 31k

0

votes

0

answers

75

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$4\times4$ magic square magic number possibilities?

combinatorics magic-square

jul 18 at 23:09 MJD 21.1k

0

votes

1

answer

186

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Affine plane of order 4?

geometry graph-theory affine-geometry

jul 18 at 4:31 Gerry Myerson 86k

0

votes

1

answer

99

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Latin squares that don't come from group tables?

combinatorics group-theory latin-square

jul 14 at 3:45 Douglas S. Stones 11.4k

1

vote

2

answers

90

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Partial latin square with $\le n-1$ filled cells

graph-theory latin-square

jul 14 at 1:50 Brian M. Scott 155k

1

vote

0

answers

50

views

Latin squares- completable-induction step [duplicate]

combinatorics latin-square

jul 13 at 0:38 Aria Fitzpatrick 60

2

votes

1

answer

74

views

2012-gon- subsets of vertices.

graph-theory ramsey-theory

jul 12 at 2:09 Xuan Huang 229

0

votes

2

answers

64

views

Complete graph-coloring

graph-theory ramsey-theory

jul 11 at 5:28 Brian M. Scott 155k

0

votes

1

answer

67

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Committees that share exactly one member

combinatorics

jul 10 at 18:38 MJD 21.1k

1

0

votes

1

answer

187

views

Loopless graph-proof

graph-theory

jul 9 at 7:16 Gerry Myerson 86k

1

vote

1

answer

123

views

perfect matching-proof

graph-theory

jul 7 at 14:19 Jernej 1,149

1

vote

3

answers

75

views

Ring map-integers proof

ring-theory

jul 6 at 18:17 Arturo Magidin 158k

Xuan Huang

31 Questions