hardmath

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7,019 reputation

11133

bio	website	uclue.com
	location	Knoxville, TN
	age	60
visits	member for	2 years, 6 months
	seen	1 hour ago
stats	profile views	867

Enjoys programming in Prolog. Will solve math problems for food.

Rosser's trick: "For every proof of me, there is a shorter proof of my negation".

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14 Favorites

added views newest activity votes

6

14

votes

1

answer

207

views

Density of odd numbers in a sequence relating base 2 and base 3 expansion

probability number-theory sequences-and-series conjectures

dec 8 at 13:26 Henry 32.1k

5

13

votes

1

answer

402

views

Minmax problem for polygons

geometry optimization

aug 3 at 9:00 Norbert 20k

6

11

votes

2

answers

633

views

Color an $n\times n$ square with $n$ colors

combinatorics latin-square

mar 1 '12 at 14:25 hardmath 7,019

1

10

votes

1

answer

173

views

On the number of integers with an even number of distinct prime factors

number-theory

mar 2 at 20:16 daniel 2,247

5

8

votes

1

answer

403

views

What is the number of bijections between two multisets?

combinatorics graph-theory elementary-set-theory multisets

jul 26 at 19:57 MJD 20.8k

3

7

votes

2

answers

675

views

Why Euclidean geometry cannot be proved incomplete by Gödel's incompleteness theorems?

logic euclidean-geometry incompleteness

dec 11 '11 at 9:26 Asaf Karagila 90.8k

3

6

votes

0

answers

114

views

Connecting cells by line and column permutations in a finite grid

group-theory graph-theory discrete-mathematics

nov 18 '11 at 1:12 Yann David 75

2

6

votes

1

answer

95

views

Umbral calculus with negative indices (and powers)

sequences-and-series reference-request generating-functions

apr 29 at 3:05 vonbrand 6,568

2

5

votes

2

answers

2

kviews

Finding irreducible polynomials over GF(2) with the fewest terms

algorithms polynomials finite-fields

dec 20 '10 at 17:05 hardmath 7,019

2

4

votes

0

answers

272

views

An optimization problem involving orthogonal matrices

linear-algebra matrices optimization numerical-methods

oct 9 '11 at 19:20 rcollyer 864

1

2

votes

1

answer

212

views

Confusion with “trivial Givens rotations” being used to eliminate values in a vector

linear-algebra matrices algorithms numerical-methods numerical-linear-algebra

apr 15 at 2:57 Community♦ 1

1

2

votes

1

answer

67

views

Maximum number of points with distance 1 in finite subsets of $\mathbb{R}^d$

geometry

dec 11 at 19:10 WimC 8,568

1

1

vote

1

answer

208

views

Definition of a function being unimodal

real-analysis convex-analysis

may 8 at 16:52 hardmath 7,019

1

0

votes

3

answers

156

views

logic question: enumerating propositions

logic model-theory

jun 27 '11 at 13:51 Carl Mummert 25.6k

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