  Twin Support Vector Machines (TWSVMs) have emerged an efficient alternative
to Support Vector Machines (SVM) for learning from imbalanced datasets. The
TWSVM learns two non-parallel classifying hyperplanes by solving a couple of
smaller sized problems. However, it is unsuitable for large datasets, as it
involves matrix operations. In this paper, we discuss a Twin Neural Network
(Twin NN) architecture for learning from large unbalanced datasets. The Twin NN
also learns an optimal feature map, allowing for better discrimination between
classes. We also present an extension of this network architecture for
multiclass datasets. Results presented in the paper demonstrate that the Twin
NN generalizes well and scales well on large unbalanced datasets.
