Math: Complex analysis

Machine-learning ideas tagged Complex analysis in the Math taxonomy of the Math2NN corpus.

△ Mechanism confirmed, baseline not beaten 2026

Lyapunov-Tuned Random Blaschke RNN

Replace an unconstrained recurrent transition by a randomly switched composition of disk-preserving Blaschke maps. The recurrent state remains in the unit disk, while the estimated average logarithmic derivative provides a direct synchronization-versus-chaos control knob: negative transverse growth should make two states driven by the same input or map sequence synchronize, whereas positive growth should preserve sensitivity and expressive memory.

Useful8/10
Difficulty6/10
Novelty7/10
Paper: The transition between synchronization and chaos for random Blaschke products arXiv:2607.15488
✗ Mechanism failed 2026

Lee-Yang Phase-Diagram Loss for Neural Potentials

Train a neural energy model using a loss that matches the modulus of its partition function in a small complex neighborhood of target phase-transition points. Instead of fitting only local energies or a selected order parameter, the model is forced to place its finite-size Lee-Yang zero minima at the correct temperature, pressure, or chemical-potential coordinates, providing a global thermodynamic constraint.

Useful7/10
Difficulty8/10
Novelty9/10
Paper: Lee-Yang Theory Guided Force Field Refinement Based on Phase Diagrams arXiv:2608.08546
✗ Failed on benchmark 2026

Poisson-Kernel Random Attractor Regularizer

Use the paper's random fixed-point attractor and associated Poisson-kernel invariant density as an explicit distributional target for an ensemble of recurrent latent states. Instead of forcing hidden states toward zero, estimate the attractor induced by the recent random map sequence and regularize the ensemble toward its analytically specified angular density.

Useful7/10
Difficulty5/10
Novelty8/10
Paper: The transition between synchronization and chaos for random Blaschke products arXiv:2607.15488
△ Mechanism confirmed, baseline not beaten 2026

Harmonic-coordinate neural PDE ansatz

Build a complex-valued coordinate map q(x) whose components are harmonic and whose gradients are mutually null, then feed q(x) into an otherwise unconstrained neural function v. Any learned output of the form u(x)=v(q(x)) is analytically harmonic when the constraints are satisfied, so the network does not need to rediscover the Laplace structure from collocation data. This is especially suitable for two-dimensional elliptic PDEs, where q=x+iy is the canonical example.

Useful7/10
Difficulty5/10
Novelty7/10
Paper: Harmonic Variables for Laplace Operators on Homogeneous Spaces arXiv:2607.14132
Unverified 2026

Sparse Legendre Shape Hypernetwork

Use a sparse multivariate Legendre expansion as the geometry-to-network-weights map, rather than an unconstrained MLP that consumes all shape parameters. The hypernetwork predicts only coefficients for a selected set of polynomial multi-indices, allowing high-dimensional or countably parameterized shape uncertainty to be handled with a number of learned terms determined by coefficient decay rather than ambient dimension.

Useful6/10
Difficulty5/10
Novelty6/10
Paper: Shape Holomorphy and Sparse Approximation of the Maxwell Electric Field Integral Operator arXiv:2609.00466
Unverified 2026

Product-Matched Spectral Trust Region

Use the paper's product-matched uniform cycle as a tractable spectral envelope for a cyclic recurrent or state-space layer. Instead of estimating the full nonnormal generator spectrum at every update, compute its forward and backward rate products and constrain each complex eigenmode to remain inside the corresponding comparison-cycle frequency bound.

Useful6/10
Difficulty5/10
Novelty8/10
Paper: Coarse-grained kinetic scale tightens thermodynamic spectral bounds of Markov cycles arXiv:2608.22934
Unverified 2026

Koenigs-Linearized Disk RNN

Constrain a recurrent latent state to the unit disk and learn an auxiliary Koenigs coordinate in which the recurrent transition is a scalar dilation. The nonlinear transition is trained to satisfy the conjugacy equation, so repeated application has a prescribed asymptotic rate instead of accumulating uncontrolled Jacobian errors.

Useful6/10
Difficulty7/10
Novelty8/10
Paper: Characterizations of extremal hyperbolic rates via Herglotz measures and Koenigs linearization arXiv:2608.18781
✗ Mechanism failed 2026

Garding Geometric-Mean Load Balancer

Replace or augment entropy-based MoE load balancing with a structured concave utility over expert loads. The utility is the geometric mean of positive linear coverage factors, so it rewards underused directions strongly while exhibiting diminishing returns for already-covered directions. Positive coefficients can encode expert capacity, hardware placement, or expert groups.

Useful6/10
Difficulty3/10
Novelty7/10
Paper: Gårding's Theorem for Posynomials arXiv:2607.09168
△ Mechanism confirmed, baseline not beaten 2026

Cross-Channel Scattering Front End

Add a differentiable SNST layer before an EEG classifier or sequence model. For every local channel pair and wavelet band, compute the magnitude of the complex cross-channel analytic response, then average it over a controllable temporal window and concatenate it with ordinary channelwise features. This gives the model an explicit, phase-robust amplitude-coupling representation that is especially useful when labeled training data are scarce.

Useful6/10
Difficulty4/10
Novelty7/10
Paper: Spatial Neighboring Scattering Transform: A Cross-Channel Amplitude Coupling Measure for EEG Connectivity arXiv:2607.08855
✗ Mechanism failed 2026

Pole-Certified SSM Initialization

Extract a small set of stable exponential modes from an observed neural sequence and use them to initialize a diagonal or block-diagonal state-space model. Hankel-pencil eigenvalues propose the modes, while persistence across shifts and contour margins reject modes caused by noise or a short-lived background.

Useful6/10
Difficulty5/10
Novelty7/10
Paper: Determinant Characteristics and Argument-Principle Certification for Visible Poles in Meromorphic Continuation arXiv:2607.04568
Unverified 2026

Supermixing Latent Recurrence

Replace or augment the transition map of a recurrent state-space model with bounded analytic maps of a latent complex coordinate, using several finite Blaschke generators that share a fixed point. Enforcing a superattracting fixed point of local degree p creates a tunable hierarchy of memory erasure: the theory predicts double-exponential decorrelation with exponent log p, while a merely attracting fixed point gives ordinary exponential decay.

Useful5/10
Difficulty7/10
Novelty9/10
Paper: Mixing for Free Semigroup Actions of Blaschke Products on the Circle arXiv:2608.13876
Unverified 2026

Entire Bilinear-Orthogonal Neural Flow

Replace an unconstrained recurrent or state-space transition with a complex-orthogonal flow generated by a skew-transpose matrix. The transition preserves a bilinear quadratic quantity exactly, preventing repeated application across long sequences from causing norm explosion or decay in the linear dynamics.

Useful5/10
Difficulty5/10
Novelty5/10
Paper: The pseudo-quantum representation of finite reversible Markov chains arXiv:2608.01253
Unverified 2026

Complex-stretched resonance layer

Insert a fixed or learnable complex coordinate stretch outside the region where a neural operator models the physical interaction, so outgoing waves are damped and resonant states become ordinary discrete eigenmodes on a finite grid. Train the network with eigenvalue or resolvent losses computed after the stretch, while preserving the physical field in the interior region.

Useful5/10
Difficulty6/10
Novelty7/10
Paper: Dirac resonances as non-self-adjoint eigenvalues arXiv:2607.26166
Unverified 2026

Pick-Spectral Boundedness Loss

For a complex-valued neural predictor, penalize violations of positive semidefiniteness of the Nevanlinna-Pick matrix on minibatch inputs. Unlike pointwise output clipping, this couples all examples and directly enforces compatibility with a bounded analytic interpolant of prescribed norm $M$.

Useful5/10
Difficulty4/10
Novelty7/10
Paper: Dynamic Nevanlinna-Pick Theory, Covariance Dilations, and Non-commutative Varieties arXiv:2608.23359
Unverified 2026

Complex Phase-Corrected State Integrator

Use the complex-conjugate palindromic coefficient that cancels the leading temporal phase defect of oscillatory modes. Implement complex arithmetic directly or use an exactly equivalent doubled-real state, then project the final state to its real component for real-valued prediction tasks.

Useful5/10
Difficulty6/10
Novelty7/10
Paper: Sharp CFL stability and temporal-dispersion optimization of symmetric splitting schemes for time-domain Maxwell equations arXiv:2608.22315