1 code implementation • 16 Sep 2022 • Alexandru Mara, Jefrey Lijffijt, Stephan Günnemann, Tijl De Bie
We find that node classification results are impacted more than network reconstruction ones, that degree-based and label-based attacks are on average the most damaging and that label heterophily can strongly influence attack performance.
2 code implementations • 19 May 2020 • Alexandru Mara, Yoosof Mashayekhi, Jefrey Lijffijt, Tijl De Bie
Experiments on a variety of real-world networks confirm that CSNE outperforms the state-of-the-art on the task of sign prediction.
2 code implementations • 25 Feb 2020 • Alexandru Mara, Jefrey Lijffijt, Tijl De Bie
Network embedding methods map a network's nodes to vectors in an embedding space, in such a way that these representations are useful for estimating some notion of similarity or proximity between pairs of nodes in the network.
1 code implementation • 14 Feb 2020 • Florian Adriaens, Alexandru Mara, Jefrey Lijffijt, Tijl De Bie
An important challenge in the field of exponential random graphs (ERGs) is the fitting of non-trivial ERGs on large graphs.
no code implementations • 28 Jan 2019 • Alexander Jung, Alfred O. Hero III, Alexandru Mara, Saeed Jahromi, Ayelet Heimowitz, Yonina C. Eldar
This lends naturally to learning the labels by total variation (TV) minimization, which we solve by applying a recently proposed primal-dual method for non-smooth convex optimization.
1 code implementation • 22 Jan 2019 • Alexandru Mara, Jefrey Lijffijt, Tijl De Bie
In this paper we present EvalNE, a Python toolbox for evaluating network embedding methods on link prediction tasks.
Social and Information Networks
no code implementations • 3 Sep 2017 • Alexandru Mara, Alexander Jung
By generalizing the concept of the compatibility condition put forward by van de Geer and Buehlmann as a powerful tool for the analysis of plain Lasso, we derive a sufficient condition, i. e., the network compatibility condition, on the underlying network topology such that network Lasso accurately learns a clustered underlying graph signal.
no code implementations • 7 Apr 2017 • Alexander Jung, Nguyen Tran Quang, Alexandru Mara
By leveraging concepts of compressed sensing, we address this gap and derive precise conditions on the underlying network topology and sampling set which guarantee the network Lasso for a particular loss function to deliver an accurate estimate of the entire underlying graph signal.
1 code implementation • 5 Dec 2016 • Alexander Jung, Alfred O. Hero III, Alexandru Mara, Saeed Jahromi
This learning algorithm allows for a highly scalable implementation as message passing over the underlying data graph.
no code implementations • 2 Nov 2016 • Alexander Jung, Alfred O. Hero III, Alexandru Mara, Sabeur Aridhi
We propose a scalable method for semi-supervised (transductive) learning from massive network-structured datasets.