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On the Log-Concavity of the Riemann Xi Kernel
Avi Gershon
Posted: 02 April 2026
On Series Involving Cubed Catalan Numbers
Kunle Adegoke
Posted: 02 April 2026
A Unified Proof of the Extended, Generalized, and Grand Riemann Hypothesis Based on the General Properties of L-Functions
Weicun Zhang
Posted: 01 April 2026
Finite Field Hudzik-Landes-Dragomir-Kato-Saito-Tamura Inequality
K. Mahesh Krishna
Posted: 01 April 2026
Finite Field Tarski-Maligranda Inequalities
K. Mahesh Krishna
Posted: 31 March 2026
Collatz Conjecture: Binary Structure Analysis and Trajectory Behavior
A. A. Durmagambetov
,A. A. Durmagambetova
Posted: 27 March 2026
Clarification and Generalization of the Restricted z-Framework with Boundary Alignment and Indexed Hadamard Factorization
Shane Drake
Posted: 25 March 2026
A Simpson–type Decomposition of the Euler–Mascheroni Constant (γ) as a Sum of Two Irrational Numbers
Kazuharu Misawa
Posted: 23 March 2026
From Chebyshev to Primorials: Establishing the Riemann Hypothesis
Frank Vega
Posted: 18 March 2026
Correlation of Generalized Divisor Functions
Huan Xiao
Posted: 17 March 2026
A Note on Fermat's Last Theorem
Frank Vega
Posted: 16 March 2026
Non-Archimedean Hudzik-Landes-Dragomir-Kato-Saito-Tamura Inequality
K. Mahesh Krishna
Posted: 16 March 2026
Non-Archimedean Massera-Schaffer-Maligranda-Pecaric-Rajic Inequality
K. Mahesh Krishna
Posted: 16 March 2026
Hypercomplex Binary Superposition Algebra: A Commutative and Associative Product
José Antoine Séqueira
Posted: 13 March 2026
Spectral and Analytic Structure of the Nyman–Beurling–Báez–Duarte Approximation
Deep Bhattacharjee
,Pallab Nandi
,Onwuka Frederick
,Priyanka Samal
We study the structural and analytic aspects of the B\'{a}ez--Duarte approximation problem within the Nyman--Beurling framework, which furnishes a functional-analytic equivalent of the Riemann Hypothesis (RH). Our work studies structural features of this framework; it does not prove RH. First (Rank-one collapse and Hilbert-space theory). The integer-dilate Gram matrix \( G_M=\frac{1}{3}\textbf{dd}^\top \) is rank-one, giving \( span\{r_1,\ldots,r_M\}=span\{x\} \) and fixed distance \( d_M=\frac12 \) for all M. We give the explicit Moore–Penrose pseudoinverse \( G_M^+ \) and the one-dimensional collapse of the optimisation problem. Second (Exact Gram matrix formula). We prove a fully rigorous closed-form expression for the inner products of the correct sawtooth basis: using the Bernoulli polynomial representation of the fractional part, \( \int_0^1\{jx\}\{kx\}\,dx = \frac{\gcd(j,k)^2}{jk}\Bigl(\frac{1}{12} + \frac{B_2(0)}{2}\Bigr) + \frac{1}{4}\Bigl(1-\frac{\gcd(j,k)}{j}\Bigr)\Bigl(1-\frac{\gcd(j,k)}{k}\Bigr) + E_{jk}, \) where \( E_{jk} \) is an explicit correction from higher Bernoulli terms, expressed via the Hurwitz zeta function. The arithmetic role of \( \gcd(j,k) \) is made precise. Third (Hardy-space bounds). Using the \( H^2(\Pi^+) \) reproducing kernel and the Mellin isometry, we prove: (a) the distance identity \( d_M^2=\|1/s-F_M^*(s)\zeta(s)/s\|_{H^2}^2 \); (b) an explicit lower bound \( d_M^2\ge\sum_\rho\frac{|F_M^*(\rho)|^2|\zeta'(\rho)|^{-2}}{|\rho|^2}\cdot c(\rho) \) from the zeros of \( \zeta \); and (c) a pointwise Hardy-space inequality relating \( d_M \) to the supremum of \( |1-F_M^*({\tfrac12}+it)\zeta({\tfrac12}+it)/({\tfrac12}+it)| \) on the critical line. Fourth (Kalman filtration stability). Under the observation model \( z_M=d_M+\varepsilon_M \) with $\varepsilon_M$ sub-Gaussian of variance \( \sigma^2 \), the Kalman estimator satisfies a rigorous oracle inequality \( \mathbf{E}|d_M^{KF}-d_M|^2\le \sigma^2 K_\infty(2-K_\infty)^{-1} \), with an almost-sure bound \( |d_M^{KF}-d_M|\le CM^{-\alpha} \) whenever \( |d_M-d|=O(M^{-\alpha}) \). Fifth (Möbius sparsity). We prove \( |c_k^*|=O(k^{-1+\varepsilon}) \) via Dirichlet series techniques and show that the coefficient sequence is bounded in \( \ell^2 \), with connections to the Möbius function made precise through the optimality conditions. Sixth (Structural Mellin theorem). We identify a hidden structural observation in the Mellin identity: the Gram kernel \( K_G(s,w)=\zeta(s+\bar w)/(s+\bar w) \) appears as the reproducing kernel of the Hardy space \( H^2(\Pi^+) \) restricted to the approximation subspace \( W_M \), and its singularity at \( s+\bar w=1 \) encodes the pole of \( \zeta \) while the zeros of \( \zeta \) in the critical strip contribute exactly as spectral obstructions. Disclaimer. This paper does not prove RH. All results are structural, computational, and analytic observations within the equivalent framework.
We study the structural and analytic aspects of the B\'{a}ez--Duarte approximation problem within the Nyman--Beurling framework, which furnishes a functional-analytic equivalent of the Riemann Hypothesis (RH). Our work studies structural features of this framework; it does not prove RH. First (Rank-one collapse and Hilbert-space theory). The integer-dilate Gram matrix \( G_M=\frac{1}{3}\textbf{dd}^\top \) is rank-one, giving \( span\{r_1,\ldots,r_M\}=span\{x\} \) and fixed distance \( d_M=\frac12 \) for all M. We give the explicit Moore–Penrose pseudoinverse \( G_M^+ \) and the one-dimensional collapse of the optimisation problem. Second (Exact Gram matrix formula). We prove a fully rigorous closed-form expression for the inner products of the correct sawtooth basis: using the Bernoulli polynomial representation of the fractional part, \( \int_0^1\{jx\}\{kx\}\,dx = \frac{\gcd(j,k)^2}{jk}\Bigl(\frac{1}{12} + \frac{B_2(0)}{2}\Bigr) + \frac{1}{4}\Bigl(1-\frac{\gcd(j,k)}{j}\Bigr)\Bigl(1-\frac{\gcd(j,k)}{k}\Bigr) + E_{jk}, \) where \( E_{jk} \) is an explicit correction from higher Bernoulli terms, expressed via the Hurwitz zeta function. The arithmetic role of \( \gcd(j,k) \) is made precise. Third (Hardy-space bounds). Using the \( H^2(\Pi^+) \) reproducing kernel and the Mellin isometry, we prove: (a) the distance identity \( d_M^2=\|1/s-F_M^*(s)\zeta(s)/s\|_{H^2}^2 \); (b) an explicit lower bound \( d_M^2\ge\sum_\rho\frac{|F_M^*(\rho)|^2|\zeta'(\rho)|^{-2}}{|\rho|^2}\cdot c(\rho) \) from the zeros of \( \zeta \); and (c) a pointwise Hardy-space inequality relating \( d_M \) to the supremum of \( |1-F_M^*({\tfrac12}+it)\zeta({\tfrac12}+it)/({\tfrac12}+it)| \) on the critical line. Fourth (Kalman filtration stability). Under the observation model \( z_M=d_M+\varepsilon_M \) with $\varepsilon_M$ sub-Gaussian of variance \( \sigma^2 \), the Kalman estimator satisfies a rigorous oracle inequality \( \mathbf{E}|d_M^{KF}-d_M|^2\le \sigma^2 K_\infty(2-K_\infty)^{-1} \), with an almost-sure bound \( |d_M^{KF}-d_M|\le CM^{-\alpha} \) whenever \( |d_M-d|=O(M^{-\alpha}) \). Fifth (Möbius sparsity). We prove \( |c_k^*|=O(k^{-1+\varepsilon}) \) via Dirichlet series techniques and show that the coefficient sequence is bounded in \( \ell^2 \), with connections to the Möbius function made precise through the optimality conditions. Sixth (Structural Mellin theorem). We identify a hidden structural observation in the Mellin identity: the Gram kernel \( K_G(s,w)=\zeta(s+\bar w)/(s+\bar w) \) appears as the reproducing kernel of the Hardy space \( H^2(\Pi^+) \) restricted to the approximation subspace \( W_M \), and its singularity at \( s+\bar w=1 \) encodes the pole of \( \zeta \) while the zeros of \( \zeta \) in the critical strip contribute exactly as spectral obstructions. Disclaimer. This paper does not prove RH. All results are structural, computational, and analytic observations within the equivalent framework.
Posted: 10 March 2026
A Resolution of the Collatz Conjecture
Michael Spencer
Posted: 09 March 2026
Toward a Proof of the Riemann Hypothesis: Insights from Elliptic Complex Analysis
Xian Wang
,Luoyi Fu
Posted: 05 March 2026
Conjecture About the Composition of Prime Numbers
Rafael Garcia-Sandoval
Posted: 04 March 2026
Primary Automorphic Forms: Theta Constants, the j–Invariant, Modular Lambda, the Dyadic Isogeny Correspondence, and Four New Structural Observations
Parker Emmerson
Posted: 03 March 2026
The Permanent Rank of a Matrix (Part Two)
Yang Yu
Posted: 02 March 2026
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