P.-S. Park's user avatar
P.-S. Park's user avatar
P.-S. Park's user avatar
P.-S. Park
  • Member for 12 years, 4 months
  • Last seen more than a week ago
14 votes
0 answers
758 views

Rep-tiles of order 4 and order 9

11 votes
2 answers
2k views

Where did the German term "Spur" of a matrix come from?

6 votes
2 answers
692 views

A game in combinatorial game theory

4 votes
2 answers
227 views

Records of densest sphere packings

2 votes
1 answer
2k views

How to find the focus of a parabola

2 votes
0 answers
354 views

Rudolff's symbol for unknown

2 votes
0 answers
134 views

Gauss’s representation number of sum of three squares

1 vote
1 answer
130 views

Far star in CGSuite

1 vote
2 answers
816 views

Angles in a nonagon

1 vote
1 answer
297 views

An equality about infinite sums involving squared harmonic numbers [duplicate]

1 vote
0 answers
170 views

Doubly-true dissections: Dissecting an $n$-gon into $s_i$-gons, such that $n = \sum s_i$

1 vote
1 answer
115 views

Problems solved by physical intuition

0 votes
1 answer
191 views

The origin of Lagrange numbers

0 votes
3 answers
656 views

How to pronounce "Sturm"? [closed]

0 votes
1 answer
440 views

Q: Babylonian tablet for pi=3.125 [closed]

-3 votes
1 answer
84 views

An angle in a regular hexagon