Feng Ji

activity

20152018

most citedPartial Euler Characteristic, Normal Generations and the stable D(2) problem

2 citations · 2 across the 3 of their papers we have counts for

collaborators

3 papers

math.GT2018

Intersections of subcomplexes in non-positively curved 2-dimensional complexes

Feng Ji, Shengkui Ye

Let $X$ be a contractible $2$ -complex which is a union of two contractible subcomplexes $Y$ and $Z .$ Is the intersection $Y \cap Z$ contractible as well? In this note, we prove that…

math.AT2017

Vanishing of $L^{2}$ -Betti numbers and failure of acylindrical hyperbolicity of matrix groups over rings

Feng Ji, Shengkui Ye

Let $R$ be an infinite commutative ring with identity and $n \geq 2$ be an integer. We prove that for each integer $i = 0, 1, \dots, n - 2,$ the $L^{2}$ -Betti number $b_{i}^{(2)} (G) = 0,$ …

math.AT2015★ 2 cited

Partial Euler Characteristic, Normal Generations and the stable D(2) problem

Feng Ji, Shengkui Ye

We study the interplay among Wall's $D (2)$ problem, normal generation conjecture (the Wiegold Conjecture) of perfect groups and Swan's problem on partial Euler characteristic and d…

Intersections of subcomplexes in non-positively curved 2-dimensional complexes

Vanishing of L2-Betti numbers and failure of acylindrical hyperbolicity of matrix groups over rings

Partial Euler Characteristic, Normal Generations and the stable D(2) problem

Vanishing of $L^{2}$ -Betti numbers and failure of acylindrical hyperbolicity of matrix groups over rings