Questions, not proof records

Open-problem statements, with their sources attached.

Each statement record keeps the mathematical question, a dated status source, accessible references, and any pinned Lean formulation separate from proof verification.

“Open” is a dated source assertion. In these pinned sources, sorry marks an admitted statement, not a proof. Source indexing does not mean the formulation has been independently built or certified by Therefore.
All topics

4 of 1194 statement records

17 source collections · 43 mathematical fields

Clear filters
Source labels openMillennium Problems · Computer science

Conjectures in Complexity Theory

P ≠ NP*:

The conjecture that the complexity classes P and NP are not equal.

Source checked Jul 26, 20261 pinned Lean statementInspect problem
Source labels openMillennium Problems · Computer science

Conjectures in Complexity Theory

NP ≠ coNP*:

The conjecture that the complexity classes NP and coNP are not equal.

Source checked Jul 26, 20261 pinned Lean statementInspect problem
Source labels openPapers · Computer science

Strong Sensitivity Conjecture (`bs(f) ≤ s(f)^2`)

Strong Sensitivity Conjecture, for every Boolean function f : {0,1}^n → {0,1}, bs(f) ≤ s(f)^2.

We call this the strong sensitivity conjecture because the original sensitivity conjecture only asked for a polynomial bound in terms of s(f). Huang's celebrated result (often called the sensitivity theorem) gives a quartic bound, bs(f) ≤ s(f)^4, thereby settling the original conjecture.

Source checked Jul 26, 20261 pinned Lean statementInspect problem
Source labels openWikipedia · Computer science

Černý Conjecture

Černý Conjecture*: Every synchronizing DFA with nn states admits a synchronizing word of length at most (n1)2(n - 1)^2.

Source checked Jul 26, 20261 pinned Lean statementInspect problem