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Wenkai Yang

Renmin University of China

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Preprint Aug 2026

On a classical zero-sum invariant

Let $G$ be a nontrivial, finite abelian group. Then $\nu (G)$ is the smallest integer $\ell$ such that every zero-sum free sequence $T$ over $G$ of length at least $\ell$ has the following property: all nonzero elements of $G$ that do not occur as a subsequence sum of $T$ lie in a proper coset of some subgroup of $G$....

A. Geroldinger, Wenkai Yang · 1 citation
Preprint Oct 2026

Additive bases and the zero-sum invariant $\mathsf{N}(G)$ for groups $C_p\oplus C_{np}$

Let $G$ be a finite abelian group, and let $c_0(G)$ be the least integer such that every regular sequence over $G$ of at least this length is an additive basis. Let $\mathsf N(G)$ be the least integer $l$ such that every weak-regular sequence $S$ over $G$ with $|S|\ge l$ has a nonempty zero-sum subsequence $T$ satisfyi...

Wenkai Yang · 0 citations
Preprint Sep 2026

On a classical zero-sum invariant II: Disproof of a long-standing conjecture

For a nontrivial finite abelian group $G$, let $\nu(G)$ be the smallest integer $\ell$ such that every zero-sum free sequence $T$ over $G$ of length at least $\ell$ has the following property: all nonzero elements of $G$ that do not occur as a subsequence sum of $T$ lie in a proper coset of some subgroup of $G$. It is...

A. Geroldinger, Guo-Qing Wang, Wenkai Yang · 0 citations
Jul 2026

DSpark: Confidence-Scheduled Speculative Decoding with Semi-Autoregressive Generation

DSpark is introduced, a speculative decoding framework that unifies high-throughput parallel generation with adaptive, load-aware verification, and enables performance tiers that were previously unattainable, shifting the Pareto frontier of the DeepSeek-V4 serving system.

Xin Cheng, Xingkai Yu, Chenze Shao et al. · 24 citations · ⚡8

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