Ragnar Freij

University Lecturer
University Lecturer
T302 Dept. Mathematics and Systems Analysis
Full researcher profile


  • Algebra and Discrete Mathematics, University Lecturer


Combinatorial Derived Matroids

Ragnar Freij-Hollanti, Relinde Jurrius, Olga Kuznetsova 2023

Toward the Capacity of Private Information Retrieval from Coded and Colluding Servers

Lukas Holzbaur, Ragnar Freij-Hollanti, Jie Li, Camilla Hollanti 2022

Private Information Retrieval from Colluding and Byzantine Servers with Binary Reed-Muller Codes

Perttu Saarela, Matteo Allaix, Ragnar Freij-Hollanti, Camilla Hollanti 2022 2022 IEEE International Symposium on Information Theory, ISIT 2022

Cyclic flats of binary matroids

Ragnar Freij-Hollanti, Matthias Grezet, Camilla Hollanti, Thomas Westerbäck 2021

Information hiding using matroid theory

Ragnar Freij-Hollanti, Olga Kuznetsova 2021

Private Information Retrieval Schemes With Product-Matrix MBR Codes

Julien Lavauzelle, Razane Tajeddine, Ragnar Freij-Hollanti, Camilla Hollanti 2021

An approximation of theta functions with applications to communications

Amaro Barreal, Mohamed Taoufiq Damir, Ragnar Freij-Hollanti, Camilla Hollanti 2020

Private Streaming With Convolutional Codes

Lukas Holzbaur, Ragnar Freij-Hollanti, Antonia Wachter-Zeh, Camilla Hollanti 2020

Low-Rank Parity-Check Codes over the Ring of Integers Modulo a Prime Power

Julian Renner, Sven Puchinger, Antonia Wachter-Zeh, Camilla Hollanti, Ragnar Freij-Hollanti 2020 2020 IEEE International Symposium on Information Theory, ISIT 2020 - Proceedings

t-Private Information Retrieval Schemes Using Transitive Codes

R. Freij-Hollanti, O. W. Gnilke, C. Hollanti, A. Horlemann-Trautmann, D. Karpuk, Ivo Kubjas 2019