Luca Ghidelli

activity

20172026

most citedOn the largest planar graphs with everywhere positive combinatorial curvature (extended arxiv version)

6 citations · 13 across the 10 of their papers we have counts for

collaborators

Showing 2020Show all

2 papers · 1 filter

math.NT2020

Convergence of Ramanujan expansions, I [Multiplicativity on Ramanujan clouds]

Giovanni Coppola, Luca Ghidelli

We call $R_{G} (a) := \sum_{q = 1}^{\infty} G (q) c_{q} (a)$ the 'Ramanujan series', of coefficient $G :$ N $\to$ C, where $c_{q} (a)$ is the well-known Ramanujan sum. We study the convergence of this…

math.NT2020★ 1 cited

Multiplicative Ramanujan coefficients of null-function

Giovanni Coppola, Luca Ghidelli

The null-function $0 (a) := 0$ , $\forall a \in$ N, has Ramanujan expansions: $0 (a) = \sum_{q = 1}^{\infty} (1/ q) c_{q} (a)$ (where $c_{q} (a) :=$ Ramanujan sum), given by Ramanujan, and $0(a)=\sum_…