researcher

P. Freitas

47 papers hereh-index 231.5k citations90 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position

sole author5
first author24
middle author5
last author13

Across the 47 of 47 papers where every author was matched, so the position is known.

fields

math.SP22
math.AP6
math-ph6
math.DG4
math.CO2
math.HO2

same name

P. Freitas — 15 papers, h 54
P. Freitas — 8 papers, h 16
P. Freitas — 6 papers, h 2
P. Freitas — 1 paper, h 5
P. Freitas — 1 paper, h 8
P. Freitas — 1 paper, h 10

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity

19992026

most citedA lower bound to the spectral threshold in curved tubes

43 citations · 106 across the 34 of their papers we have counts for

collaborators

Showing math.COShow all

2 papers · 1 filter

math.CO2013★ 1 cited

Counting Spectral Radii of Matrices with Positive Entries

J. A. Dias da Silva, Pedro J. Freitas

The sum-product conjecture of Erd\H os and Szemerédi states that, given a finite set $A$ of positive numbers, one can find asymptotic lower bounds for $max {∣ A + A ∣, ∣ A \cdot A ∣}$ of…

math.CO2001★ 2 cited

A Heawood-type result for the algebraic connectivity of graphs on surfaces

Pedro Freitas

We prove that the algebraic connectivity a(G) of a graph embedded on a nonplanar surface satisfies a Heawood-type result. More precisely, it is shown that the algebraic connectivit…