# Questions tagged [open-problems]

If it turns out that a problem is equivalent to a known open problem, then the open-problem tag is added. After that, the question essentially becomes, "What is known about this problem? What are some possible ways to approach this problem? What are some ways that people have tried to attack it before, and with what results?"

**3**

**1**answer

### reduction to np hard ordering problem

**1**

**1**answer

### A possible minimal aperiodic set of corner Wang Tile

**1**

**0**answers

### Both NP-hard but different [closed]

**8**

**2**answers

### Update on list of open problems for Cherednik/Symplectic Reflection Algebras

**9**

**4**answers

### Is the Manickam-Miklós-Singhi Conjecture solved? [closed]

**10**

**1**answer

### Subspaces of $l_{1}$ are not Lipschitz complemented in $l_{1}$

**12**

**1**answer

### Is there a non-zero ghost map between finite suspension spectra?

**11**

**1**answer

### A special case of the integer Hodge conjecture

**4**

**0**answers

### Packing space by cones: Translates best?

**0**

**1**answer

### Rost Correspondence and minimal Pfister-Neighbors

**19**

**2**answers

### Generating random finite groups

**1**

**1**answer

### simple cycle analog in 2D (with application in tiling)

**6**

**1**answer

### Is there a precise notion of “almost all” such that almost all finite groups are Galois groups of extensions of the rationals?

**1**

**1**answer

### relationship between corner tile and edge tile of wang tile

**44**

**1**answer

### improving known bounds for Pierce expansions; cash prize

**6**

**1**answer

### Integral straight-line embeddings of planar graphs

**20**

**3**answers

### What is Chern-Simons theory expected to assign to a point?

**3**

**2**answers

### Conjecture of a subset of Wang tile which might be decidable

**58**

**1**answer

### Which region in the plane with a given area has the most domino tilings?

**8**

**1**answer

### What keeps asymptotic Goldbach's conjecture out of reach of current technology?

**5**

**6**answers

### practical algorithms for np complete problems

**18**

**2**answers

### Determine or estimate the number of maximal triangle-free graphs on $n$ vertices

**8**

**3**answers

### Objections to and arguments for the simplicity of all Riemann zeros

**11**

**3**answers

### An integral related to the Euler gamma function

**3**

**1**answer

### Real analytic ergodic diffeomorphisms of the two sphere

**8**

**1**answer

### Ramanujan's problem 754 still open?

**9**

**0**answers

### Convergence in $L^2$ of iterated expectations

**15**

**1**answer

### An infinite, amenable, finitely presentable group with no non-trivial finite quotients

**36**

**2**answers

### A group-theoretic perspective on Frankl's union closed problem

**15**

**0**answers

### An open problem in convex geometry

**18**

**2**answers

### Floors of rationals to powers: Infinite number of primes?

**11**

**0**answers

### Stability of analytic Zariski structures

**3**

**0**answers

### Automorphisms of the L-function associated to an elliptic $\mathbb{Q}$-curve

**13**

**0**answers

### Second duals of Grothendieck spaces

**7**

**4**answers

### Interactions of number theoretic conjectures and other fields of mathematics

**2**

**1**answer

### Any results towards the irrationality of the sum of reciprocals of perfect numbers? [closed]

**24**

**1**answer

### A Question on 1, 2 ,3 Conjecture

**7**

**4**answers

### A Special Pair of Models for ZFC (New Version)

**5**

**0**answers

### Forcing with c.c.c forcing notions, Cohen reals and Random reals

**4**

**1**answer

### A Hot Betting On HOD

**4**

**0**answers

### A challenging non homogenous fractional inequality

**9**

**1**answer

### Euclidean real quadratic fields

**24**

**0**answers

### Decidability of equality of elementary expressions

**11**

**2**answers

### Is the Steiner ratio Gilbert–Pollak conjecture still open?

**13**

**1**answer

### Is $\varliminf_{n \rightarrow +\infty} |n \sin n| = 0$ correct, where $n$ is an integer?

**2**

**4**answers

### Product of exponents of prime factorization

**2**

**0**answers

### What are the divisors of $2n^2 - \sigma_{1}(n^2)$ for composite $n$?

**1**

**0**answers

### Can six square numbers be simultaneously represented in a single sum of consecutive odd numbers? [closed]

**7**

**0**answers

### Graphs with graphic imbalance sequences

**6**

**1**answer