$EIGN eigenvalue

Latest papers

1. Towards Certifiable State Estimation under Observability Degeneracy cs.RO · 14 Oct · 1 hit

   …Third, we derive a model-specific adaptive dual safety threshold parameterized by the minimum non-zero eigenvalue of the observable Hessian and uneradicated residual leakage, preventing false rejections of…

2. Quantum Spectral Estimation with Multiple Initial States: Improved Error and Cost Scaling quant-ph · 14 Oct · 3 hits

   …and generalized Hadamard tests. Building on the QFAMES (quantum filtering and analysis of multiplicities in eigenvalue spectra) framework, we introduce a new method that samples evolution times independently for each…

3. Degeneracy graph determinants and higher-dimensional Young diagrams hep-th · 14 Oct · 2 hits

   …on the projector basis, and conjectured a factorised formula for this determinant, as a product of powers of eigenvalue differences. We prove this formula for any number of generators. The proof uses graph analogues of…

4. Excited-State Effects in Nucleon Sigma Terms from a Variational Analysis hep-lat · 14 Oct · 1 hit

   …and a charm quark with quark masses tuned to approximately their physical value. We solve the generalized eigenvalue problem that arises from the matrix of correlators and show that the three-point function for the…

5. Scaled Companion Linearizations for Coefficientwise Backward Stability math.NA · 14 Oct · 1 hit

   A central goal in solving a polynomial eigenvalue problem is to compute eigenpairs that are exact for a nearby polynomial, with each coefficient…

6. Nonexistence of Strongly Regular Graphs via Gegenbauer Positivity and SRG Counting math.CO · 14 Oct · 1 hit

   …Our aim is a systematic method that treats many parameter sets through the same construction. For least eigenvalue $-3$, it gives new counting certificates for $(351,140,73,44)$, $(550,162,75,36)$,…

7. A note on the failure of Payne's inequality on manifolds with boundary math.SP · 14 Oct · 2 hits

   We show that Payne's conjecture on the comparison between Dirichlet Laplacian eigenvalues and buckling eigenvalues does not hold on flat and hyperbolic cylindrical surfaces and on (round) hemispheres.

8. A starlike 3-dimensional counterexample to the hot spots conjecture math.AP · 14 Oct · 2 hits

   …Lipschitz domain in $\mathbb{R}^3$ that is starlike about the origin and whose first positive Neumann eigenvalue is simple. A corresponding eigenfunction, after a choice of sign, has its unique global maximum at…