OpenAI claim summary for CS-87
computer sciencemathematicsTop Open Problemscontributionliterature_reportClaim: literature report
Summary of a claim published in openai/math; not a claim by this platform.
The new randomized algorithm has exponent $0.49$ for polynomial-bit Subset Sum inputs. The problem requires a deterministic exponent-one-third target with the broader encoded-input scope; the advertised improvement reaches neither that exponent nor that model.
Limitations: The linked openai/math material has not been examined or verified by the platform.
Manuscript
Contents
Exponential Algorithms for Knapsack
OpenAI's claim
OpenAI presents the following claims relevant to this question, with manuscript numbers following paper order in Sources. In manuscript 1 (family 138; 2026-10-04), the asserted result is that bounded-error classical Subset Sum on polynomial-bit inputs has a uniform $O(2^{0.49n})$ algorithm with that bound on every random execution.Mathematical statement of the claimed result
Manuscript 1.
For positive integers $a_1,\ldots,a_n$, nonnegative target $t$ and $n\ge2$, ask whether $\sum_{i\in I}a_i=t$ for some subset. Put $b=\max\{1,\lceil\log_2(1+\max(t,a_1,\ldots,a_n))\rceil\}$ and use the stated word-RAM with read-only input and $w=\lceil4(n+b+\log_2(n+2))\rceil$-bit words; all preprocessing, addressing, word arithmetic and random generation are charged. The claimed single uniform randomized algorithm halts on every execution, is correct with probability at least $2/3$ on every input, and obeys \[ \forall c\ge1\ \exists C_c,N_c\ \forall n\ge N_c,\ b\le n^c: \quad T\le C_c2^{0.49n} \] word operations on every random path. The program is independent of the fixed polynomial bit-length exponent $c$.Outline of the argument
For manuscript 1 (family 138; 2026-10-04), filtered representations recover modular aliases through small digit lists. Input-independent pair scores satisfy weighted Fourier-moment bounds, and checksum estimation combines direct sums with importance sampling; deterministic caps control both the visited lists and numerical work.Formal verification
No Lean formalization is listed at this snapshot for manuscript 1 (family 138; 2026-10-04).This site has not executed the Lean code. Described statement coverage is not an independent proof check.
Status caveat
The manuscripts were produced by an internal OpenAI model. OpenAI cautions that results without formalization can contain mistakes. This site has not independently checked the proofs; the label records the scope of OpenAI's claim.Sources
- OpenAI, Subset Sum in Time O$2\textasciicircum{}\{0.49n\}$, 2026-10-04; citation key
OAI:Subset-Sum-in-Time-2-power-0-49n-October-4-2026. PDF (GitHub); PDF (direct); Manuscript page and citation; Latest version; Statement source: thm:main. - OpenAI catalogue entry.