Open Problems

Title	Author(s)	Imp.¹	Rec.²	Area » Topic » Subtopic	Posted by
Sequence defined on multisets	Erickson	✭✭	1	Combinatorics	Martin Erickson
Square achievement game on an n x n grid	Erickson	✭✭	1	Combinatorics	Martin Erickson
Transversal achievement game on a square grid	Erickson	✭✭	1	Combinatorics	Martin Erickson
Length of surreal product	Gonshor	✭	1	Combinatorics	Lukáš Lánský
Roller Coaster permutations	Ahmed; Snevily	✭✭✭	0	Combinatorics	Tanbir Ahmed
The Double Cap Conjecture	Kalai	✭✭	0	Combinatorics	Jon Noel
Saturation in the Hypercube	Morrison; Noel; Scott	✭✭	0	Combinatorics	Jon Noel
Extremal $4$-Neighbour Bootstrap Percolation in the Hypercube	Morrison; Noel	✭✭	0	Combinatorics	Jon Noel
Turán Problem for $10$-Cycles in the Hypercube	Erdos	✭✭	0	Combinatorics	Jon Noel
$C^r$ Stability Conjecture	Palis; Smale	✭✭✭✭	0	Analysis	m n
Invariant subspace problem		✭✭✭	0	Analysis	tchow
Criterion for boundedness of power series	Rüdinger	✭	1	Analysis	andreasruedinger
Something like Picard for 1-forms	Elsner	✭✭	0	Analysis	MathOMan
Inequality for square summable complex series	Retkes	✭✭	1	Analysis	tigris35711
trace inequality		✭✭	0	Algebra	Miwa Lin
Elementary symmetric of a sum of matrices		✭✭✭	0	Algebra	rscosa
Finite Lattice Representation Problem		✭✭✭✭	0	Algebra	williamdemeo
Sub-atomic product of funcoids is a categorical product		✭✭	0	Algebra	porton
inverse of an integer matrix	Gregory	✭✭	0	Algebra	lvoyster
Graphs of exact colorings		✭✭	0	Algebra	sabisood
Waring rank of determinant	Teitler	✭✭	0	Algebra	Zach Teitler

Open Problem Garden