Adjacent pairs (Possible): what nobody has asked yet

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select id, a_kind, substr(a_label,1,120) a, b_kind, substr(b_label,1,120) b, bridge, distance, novelty, status from adjacent_pair where status<>'withdrawn' order by random() limit 50

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ida_kindab_kindbbridgedistancenoveltystatus
ap-52f18bcfce problem Size and shape of the universe : The diameter of the observable universe is approximately 93 billion light-years; what i problem Shape of the universe : What is the 3- manifold of comoving space , i.e., of a comoving spatial section of the universe, shape universe adjacent-field novel unasked
ap-3ff9929b93 problem The exchange rate disconnect puzzle : The exchange rate disconnect puzzle, also one of the so-called real exchange rate method single-cell sequencing reanalysis   far novel unasked
ap-f6567ec188 problem Is it possible to dissect a disk into congruent pieces, so that a neighborhood of the origin is contained within a singl method spectral graph theory   same-field unknown unasked
ap-dde181bcc5 problem Approximating the sign rank of a matrix. The sign rank of a matrix A with +1,-1 entries is the least rank (over the real problem distribution of degree of minimum polynomial for eigenvalues of random matrix with elements in finite field. This is an matrix entries adjacent-field novel unasked
ap-efe1fd8a70 claim The drop of Accuracy@1 from 61.3% (N=2) to 31.1% (N=5) in Table 3 indicates that the LLM judge lacks global discriminati method meta-analysis   same-field unknown unasked
ap-0dda9c48dd problem Black hole information paradox and black hole radiation : Do black holes produce thermal radiation, as expected on theor problem Problem of time : In quantum mechanics, time is a classical background parameter, and the flow of time is universal and quantum mechanics adjacent-field novel unasked
ap-7ba9c011fd problem p-nuclei : What astrophysical process is responsible for the nucleogenesis of these rare isotopes? problem p-nuclei : What astrophysical process is responsible for the nucleogenesis of these rare isotopes? responsible nucleogenesis adjacent-field duplicate unasked
ap-fa33639c9e problem Noisy channel coding theorem in quantum information. Why Shannon's noisy channel coding theorem can't be used for quantu problem Threshold problem : Can we go beyond the noisy intermediate-scale quantum era ? Can quantum computers reach fault tolera error correction far novel unasked
ap-d570f1c52b problem Can the now widely available topographic data be used to derive past tectonic and climatic conditions (in the multi-mill method crowdsourced verification   far novel unasked
ap-a0ee93cfa9 problem Is there a complex structure on the 6-sphere? I don't know who first asked this question, but it's a question that I thi method evolutionary search   adjacent-field unknown unasked
ap-c733a13775 problem When shorter means smaller? Assume a convex figure $F\subset \mathbb R^2$ satisfies the following property: if $f:F\to \ method Lean formalization   same-field unknown unasked
ap-bf710fd01b paper Understanding the difficulty of training deep feedforward neural networks problem Why do models fail to capture long-range interactions? (Message Passing Neural Networks (MPNNs), one of the most widely neural networks adjacent-field unknown unasked
ap-b2d9526e46 problem Convex hull in CAT(0). Let $X$ be complete $\mathop{CAT}(0)$ -space and $K\subset X$ be a compact subset. Is it true tha method LLM-driven proof search   adjacent-field unknown unasked
ap-e6370f6b78 problem Complex vector bundles that are not holomorphic. Is there an example of a complex bundle on $\mathbb CP^n$ or on a Fano method spectral graph theory   same-field unknown unasked
ap-7afb4eb1e1 problem $\Delta = 57, d=2$ Moore Graph. I am looking into the last open question regarding the existence of Moore Graphs of diam problem Do there exist infinitely many strongly regular geodetic graphs , or any strongly regular geodetic graphs that are not M moore graphs adjacent-field novel unasked
ap-450c825afd problem The complexity of checking whether two DAG have the same number of topological sorts. This problem is highly related to method reinforcement learning   same-field unknown unasked
ap-80ceca2fa6 problem Development and evolution of the brain . How and why did the brain evolve? What are the molecular determinants of indivi problem The emergence and evolution of intelligence : What are the laws and mechanisms - of new idea emergence ( insight , creat development evolution adjacent-field novel unasked
ap-6f5d4a1428 problem Quantum capacity : The capacity of a quantum channel is in general not known. [ 9 ] problem Quantum capacity : The capacity of a quantum channel is in general not known. [ 111 ] quantum capacity far duplicate unasked
ap-a99f5ec0c2 problem Optimal algorithm for finding the girth of a sparse graph? I wonder how to find the girth of a sparse undirected graph. problem Hilbert's sixteenth problem : what are the possible configurations of the connected components of M-curves ? connected components adjacent-field novel unasked
ap-2307cece5d problem Can the now widely available topographic data be used to derive past tectonic and climatic conditions (in the multi-mill method preregistered replication   far novel unasked
ap-8b85c585a1 problem A combinatorial version for the polynomial Hirsch conjecture. Consider $t$ disjoint families of subsets of {1,2,…,n}, ${ problem A variant of Freiling's Axiom of Symmetry and a weak form of the Continuum Hypothesis in models where all sets of reals families subsets adjacent-field novel unasked
ap-45e3a8d782 problem Behrens–Fisher problem : Yuri Linnik showed in 1966 that there is no uniformly most powerful test for the difference of method reinforcement learning   adjacent-field novel unasked
ap-4057941884 problem What is the 3- manifold of comoving space , i.e. of a comoving spatial section of the universe, informally called the "s problem Shape of the universe : What is the 3- manifold of comoving space , i.e., of a comoving spatial section of the universe, shape universe adjacent-field duplicate unasked
ap-e49d5d853a problem Decidability of equality of elementary expressions. In the following definition the term expression is to be understood method Lean formalization   same-field unknown unasked
ap-9273ec0b00 problem Is optimally solving the n×n×n Rubik's Cube NP-hard? Consider the obvious $n\times n\times n$ generalization of the Rubi method reinforcement learning   same-field unknown unasked
ap-f181877ec2 problem Size and shape of the universe : The diameter of the observable universe is approximately 93 billion light-years; what i problem Size of universe : The diameter of the observable universe is about 93 billion light-years (or equivalently a radius of observable universe adjacent-field duplicate unasked
ap-22c2e8fe53 problem Conjecture 1.3 (Caro ): Let $F$ be a forest with $m$ edges. Then $R(tF,\mathbb{Z}_{mt})=R(tF,2)$ for all sufficiently la method LLM-driven proof search   adjacent-field novel unasked
ap-8c4d45fe82 problem The lipid divide : How did archaea end up using membrane glycerophospholipids of the opposite chirality compared to bact method causal inference from observational data   far novel unasked
ap-653d4d6ae1 paper Understanding the difficulty of training deep feedforward neural networks problem Connectionism : Can the mind be explained by mathematical models known as artificial neural networks ? neural networks adjacent-field unknown unasked
ap-d76e76edae problem Cosmological constant problem : Why does the zero-point energy of the vacuum not cause a large cosmological constant ? [ problem Cosmological constant problem : Why does the zero-point energy of the vacuum not cause a large cosmological constant ? W cosmological constant adjacent-field duplicate unasked
ap-7c1e52b947 problem Finite-dimensional subalgebras of $C^\star$-algebras. Let $A$ be a unital $C^\star$-algebra and let $a_1,\dots,a_n$ be a method evolutionary search   adjacent-field unknown unasked
ap-1b4bef090b problem Open, but could be disproved with a finite counterexample. - $250 If $p(z)\in\mathbb{C}[z]$ is a monic polynomial of deg method spectral graph theory   same-field unknown unasked
ap-11555f7e4e problem Projective Plane of Order 12. Objective : Settle the conjecture that there is no projective plane of order 12. In 1989, problem Projective Plane of Order 12. I asked this question on the new Theoretical Computer Science "overflow" site, and comment objective settle adjacent-field novel unasked
ap-b2359b7889 problem How do star-forming structures form from the diffuse interstellar medium ? How do these structures interact with the ISM problem Diffuse interstellar bands : What is responsible for the numerous interstellar absorption lines detected in astronomical diffuse interstellar adjacent-field novel unasked
ap-617db2ff8f problem Conjecture 1.3 (Caro ): Let $F$ be a forest with $m$ edges. Then $R(tF,\mathbb{Z}_{mt})=R(tF,2)$ for all sufficiently la method evolutionary search   adjacent-field novel unasked
ap-180fa20fea problem Why is contestedness flat in the number of evidence documents? Retrieval surfacing both sides of contested claims, or an problem Economics seed: do the 18 Camerer et al. 2016 replications of experimental-economics results show the same ~20% conteste evidence documents adjacent-field novel answered
ap-c5e3e1a6f5 problem Behrens–Fisher problem : Yuri Linnik showed in 1966 that there is no uniformly most powerful test for the difference of method active learning / Bayesian optimization   adjacent-field novel unasked
ap-e8a3a2fc0f problem Polynomial bijection from $\mathbb Q\times\mathbb Q$ to $\mathbb Q$? Is there any polynomial $f(x,y)\in{\mathbb Q}[x,y]{ method evolutionary search   adjacent-field unknown unasked
ap-8cb48c05e5 problem Trees in groups of exponential growth. Question: Let $G$ be a finitely generated group with exponential growth. Is there method Lean formalization   same-field unknown unasked
ap-21a72db6eb problem Is optimally solving the n×n×n Rubik's Cube NP-hard? Consider the obvious $n\times n\times n$ generalization of the Rubi problem Covering the primes by arithmetic progressions. Define the length of a set of arithmetic progressions of natural numbers shortest sequence adjacent-field novel unasked
ap-1a3e6f0eeb problem A function whose fixed points are the primes. If $a(n) = (\text{largest proper divisor of } n)$, let $f:\mathbb{N} \setm method spectral graph theory   same-field unknown unasked
ap-548972694a problem Identifying Reducible/Irreducible polynomials over $Z[x]$. It is well known LLL algorithm provides a fully polynomial al problem Irreducible polynomials with constrained coefficients. Over at the Cafe, after reading about TWF 285, I asked more-or-le irreducible polynomials adjacent-field novel unasked
ap-914b9c3d61 problem Is there a known Turing machine which halts if and only if the Collatz conjecture has a counterexample? Some of the simp method evolutionary search   adjacent-field unknown unasked
ap-239464655b problem Origin of Eukaryotes ( Symbiogenesis ). How and why did cells combine to form the eukaryotic cell? Did one or more rando method causal inference from observational data   far novel unasked
ap-2fda98dcbc problem Why do we have the number of tropical cyclones that we do? [ 10 ] method large-scale text mining of the literature   far novel unasked
ap-21077438c6 problem A simple group with 3 generators. All finite simple groups are generated by two elements, though apparently the proof is method spectral graph theory   same-field unknown unasked
ap-dcb3f60f17 problem Why do we have the number of tropical cyclones that we do? [ 10 ] method meta-analysis   far novel unasked
ap-1e40dc3de5 problem Open Problem 1 (Formal Separation of Geometric and Algorithmic Compression): The core theoretical challenge is to establ method Lean formalization   adjacent-field novel unasked
ap-57e12a2ffb problem Inverse protein-folding problem ( protein design ): Is it possible to design a polypeptide sequence which will adopt a g problem Protein design : Is it possible to design highly active enzymes de novo for any desired reaction? [ 17 ] protein design adjacent-field duplicate unasked
ap-375950f4b5 problem Horizon problem : Why is the distant universe so homogeneous when the Big Bang theory seems to predict larger measurable problem Faster-than-light neutrino anomaly (2011–2012): In 2011, the OPERA experiment mistakenly observed neutrinos appearing to speed light adjacent-field novel unasked