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Mathematical findings

432 source-grounded records. Verification labels remain separate from source authentication and publication status.

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combinatoricsSep 2, 2026Significance 22/100Registry: unreviewed

Anari's Bethe permanent conjecture

Prior state unknown→proved

For every nonnegative n×nn\times n matrix AA whose bipartite support graph has girth at least an even integer g≥4g\ge4, Dong and Jain prove the sharp inequality Bethe⁡(A)≤per⁡(A)≤22n/gBethe⁡(A).\operatorname{Bethe}(A)\le\operatorname{per}(A)\le2^{2n/g}\operatorname{Bethe}(A). The factor 22n/g2^{2n/g} is optimal whenever g∣2ng\mid2n, attained by matrices whose support graphs are disjoint unions of gg-cycles. Thus the result confirms Anari's conjectur…

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probability-statisticsJan 14, 2026Significance 22/100Registry: unreviewed

Courtade and Kumar's Coordinate-wise Mutual Information Question

Prior state unknown→proved

Fully resolves the posed coordinate-wise question; the main Courtade-Kumar conjecture itself remains open outside the extended high-noise range.

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geometry-topologyAug 27, 2026Significance 22/100Registry: unreviewed

Large systoles in every sufficiently large genus

Prior state unknown→proved

The theorem improves the best lower bound valid in *every* sufficiently large genus from asymptotic constant 2/92/9 to 11. The every-genus ladder it climbs is Katz-Sabourau's 19/12019/120 and then Liu-Petri's 2/92/9, the latter also by a random construction. Constant 11 was already reached by Petri-Walker along a subsequence of genera, following Erdos-Sachs, so the new contribution is achieving it uniformly rather than…

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geometry-topologyAug 10, 2026Significance 22/100Registry: unreviewed

The Hyperkahler Period-Index Conjecture

Prior state unknown→disproved

The counterexamples come with divisibility bounds on the Hodge-theoretic index, at 2-torsion and 5-torsion, on very general hyperkahler fourfolds.

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algebraAug 4, 2026Significance 22/100Registry: unreviewed

Finite Generation for klt Generalized Pairs

Prior state unknown→disproved

The paper records how stuck this was: the first author had discussed the question with Caucher Birkar, Osamu Fujino, Christopher D. Hacon, Junpeng Jiao, Vladimir Lazic and Lingyao Xie, and writes that despite a general feeling that a negative answer was likely, no precise counterexample could be found. The authors also note that, given the limitations of generative AI, they may have missed related literature and wel…

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analysisAug 9, 2026Significance 22/100Registry: unreviewed

The Planar Berenstein Conjecture

Prior state unknown→disproved

The domain has dihedral symmetry of order 26 and is neither a disc nor centrally symmetric, and its eigenfunction changes sign - which is why an additional sign assumption rescues the statement.

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quantum-information-computingAug 5, 2026Significance 22/100Registry: unreviewed

Completeness of Maximally Entangled States for Pseudo-Telepathy

Prior state unknown→disproved

VibeMathed recorded: Completeness of Maximally Entangled States for Pseudo-Telepathy. Consult the linked registry entry for the original report and scope.

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analysisAug 6, 2026Significance 22/100Registry: unreviewed

The Inverse Generator Problem on Hilbert Spaces

Prior state unknown→disproved

One finite-dimensional construction settles several related questions. Besides the inverse generator problem, it gives a generator whose Cayley transforms satisfy the ordinary Kreiss resolvent condition but are neither strongly Kreiss bounded nor power bounded, and it shows the Crank-Nicolson scheme is unstable in operator norm both over long times at fixed step size and under mesh refinement at fixed final time. Ve…

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geometry-topologyAug 13, 2026Significance 20/100Registry: unreviewed

Courtade's conjecture on volumes of Minkowski sums with the ball

Prior state unknown→disproved

Courtade conjectured that for convex bodies B,C⊂RnB,C\subset\mathbb R^n, (∣B∣∣C∣)1/n+(∣B2n∣∣B2n+B+C∣)1/n≤∣B2n+B∣1/n∣B2n+C∣1/n. (|B||C|)^{1/n} + (|B_2^n||B_2^n+B+C|)^{1/n} \le |B_2^n+B|^{1/n}|B_2^n+C|^{1/n}. The paper proves that this inequality is false in every dimension n≥3n\ge3. In dimension 33, it gives an explicit geometric counterexample using two orthogonal double bodies of revolution. It then strengthens this by constructing zonoid counterexamples in every d…

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combinatoricsSep 4, 2026Significance 20/100Registry: unreviewed

Cycle-residue stability at minimum degree five

Prior state unknown→proved

The preprint claims an exact classification. Write C5(G)C_5(G) for the residues modulo five represented by cycle lengths in GG. Let E5=K6,K5,5∪H5,n;t:2≤t≤5<n\mathcal E_5={K_6,K_{5,5}}\cup{H_{5,n;t}:2\le t\le5<n}, where H5,n;tH_{5,n;t} is obtained from K5,nK_{5,n} by deleting 5−t5-t edges incident with one vertex in the part of size nn. For every finite simple graph GG with minimum degree at least five, exactly one alternative holds:…

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analysisSep 1, 2026Significance 20/100Registry: unreviewed

McKean Entropy-Production Conjecture

Prior state unknown→disproved

For the space-homogeneous Boltzmann equation in dimension 33 with collision kernels B=14π∣v−v∗∣γ,γ∈[0,1],B=\frac{1}{4\pi}|v-v_*|^\gamma,\qquad \gamma\in[0,1], the paper constructs smooth, positive, radial mixtures fR=(1−p)M1+pMRf_R=(1-p)M_1+pM_R for which ∂tD(fR)>0\partial_tD(f_R)>0 for sufficiently large RR. Thus entropy production need not decrease even for Maxwell molecules (γ=0\gamma=0) or hard spheres (γ=1\gamma=1), negatively resolving McKean's…

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logic-foundationsSep 4, 2026Significance 20/100Registry: unreviewed

Equivalence of generic stability notions for Keisler measures

proved→proved

Let TT be a complete first-order theory in discrete or continuous logic, let M≺UM\prec\mathcal{U}, and let μ∈Mx(U)\mu\in\mathfrak{M}_{x}(\mathcal{U}) be Borel-definable over MM. The paper proves that the following three conditions are equivalent: (i)(i) μ\mu is a frequency interpretation measure (fim) over MM; (ii)(ii) μ\mu is definable over MM and its canonical random extension rμr_{\mu} is generically stable over…

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combinatoricsJul 21, 2026Significance 20/100Registry: unreviewed

Norine's Antipodal-Colouring Conjecture

Prior state unknown→proved

VibeMathed recorded: Norine's Antipodal-Colouring Conjecture. Consult the linked registry entry for the original report and scope.

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analysisAug 3, 2026Significance 20/100Registry: unreviewed

Sharpness of Denjoy's Theorem

Prior state unknown→proved

VibeMathed recorded: Sharpness of Denjoy's Theorem. Consult the linked registry entry for the original report and scope.

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geometry-topologyJun 26, 2026Significance 20/100Registry: unreviewed

Erdos's Question on the Independence Ratio of Unit-Distance Graphs

Prior state unknown→proved

VibeMathed recorded: Erdos's Question on the Independence Ratio of Unit-Distance Graphs. Consult the linked registry entry for the original report and scope.

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geometry-topologyJul 27, 2026Significance 20/100Registry: unreviewed

Kuperberg's Six-Cylinder Conjecture

Prior state unknown→proved

VibeMathed recorded: Kuperberg's Six-Cylinder Conjecture. Consult the linked registry entry for the original report and scope.

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algebraJul 27, 2026Significance 20/100Registry: unreviewed

Infinitely Many Components in Auslander–Reiten Quivers over Perfect Fields

Prior state unknown→proved

VibeMathed recorded: Infinitely Many Components in Auslander–Reiten Quivers over Perfect Fields. Consult the linked registry entry for the original report and scope.

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theoretical-computer-scienceJun 24, 2026Significance 20/100Registry: unreviewed

Quadratic-Time Hardness of Furthest Pair in Superconstant Dimension

Prior state unknown→proved

VibeMathed recorded: Quadratic-Time Hardness of Furthest Pair in Superconstant Dimension. Consult the linked registry entry for the original report and scope.

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probability-statisticsMay 12, 2026Significance 20/100Registry: unreviewed

Maximum Entropy of Sums of Independent Ternary Random Variables

Prior state unknown→proved

VibeMathed recorded: Maximum Entropy of Sums of Independent Ternary Random Variables. Consult the linked registry entry for the original report and scope.

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geometry-topologyJul 22, 2026Significance 20/100Registry: unreviewed

The Minimal Distance Problem

Prior state unknown→proved

also disproves a separate finite-field conjecture of Hunter, Pohoata, Verstraete and Zhang

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probability-statisticsJul 3, 2026Significance 20/100Registry: unreviewed

The Signed BAR Uniqueness Problem

Prior state unknown→proved

VibeMathed recorded: The Signed BAR Uniqueness Problem. Consult the linked registry entry for the original report and scope.

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analysisJul 29, 2026Significance 20/100Registry: unreviewed

Fuglede's Conjecture on Square-Free Cyclic Groups With Rapidly Growing Primes

Prior state unknown→proved

A partial result. Fuglede's conjecture remains open for finite cyclic groups generally; this settles an infinite family and, for the spectral-to-tiling direction, only under rapid growth of the prime factors.

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