Open Problem Garden
Help
About
Contact
login/create account
Home
»
Subject
»
Number Theory
Combinatorial Number Theory
Title
Author(s)
Imp.¹
Rec.²
Subtopic
Posted by
Sets with distinct subset sums
Erdos
✭✭✭
0
mdevos
The 3n+1 conjecture
Collatz
✭✭✭
0
dododododo
Odd incongruent covering systems
Erdos
;
Selfridge
✭✭✭
0
Robert Samal
Davenport's constant
✭✭✭
0
mdevos
Snevily's conjecture
Snevily
✭✭✭
1
mdevos
Olson's Conjecture
Olson
✭✭
0
mdevos
Few subsequence sums in Z_n x Z_n
Bollobas
;
Leader
✭✭
0
mdevos
Gao's theorem for nonabelian groups
DeVos
✭✭
0
mdevos
Covering systems with big moduli
Erdos
;
Selfridge
✭✭
0
Robert Samal
Divisibility of central binomial coefficients
Graham
✭✭
1
maxal
Frobenius number of four or more integers
✭✭
1
maxal
Singmaster's conjecture
Singmaster
✭✭
1
Zach Teitler
Navigate
Subject
Algebra
(295)
Analysis
(5)
Combinatorics
(35)
Geometry
(29)
Graph Theory
(228)
Group Theory
(5)
Logic
(10)
Number Theory
(49)
Additive N.T.
(3)
Analytic N.T.
(10)
Combinatorial N.T.
(12)
Computational N.T.
(5)
PDEs
(0)
Probability
(1)
Theoretical Comp. Sci.
(13)
Topology
(40)
Unsorted
(1)
Author index
Keyword index
more
Recent Activity
Nowhere-zero flows
Shuffle-Exchange Conjecture
Algebra
Seagull problem
Solution to the Lonely Runner Conjecture
more