activity
20142026
most citedQuaternion Derivatives: The GHR Calculus

125 citations · 128 across the 5 of their papers we have counts for

collaborators

6 papers

stat.ML2026

Hypercomplex Widely Linear Processing: Fundamentals for Quaternion Machine Learning

Sayed Pouria Talebi, Clive Cheong Took

Numerous attempts have been made to replicate the success of complex-valued algebra in engineering and science to other hypercomplex domains such as quaternions, tessarines, biquat…

quant-ph2025

A Quantum of Learning: Using Quaternion Algebra to Model Learning on Quantum Devices

Sayed Pouria Talebi, Clive Cheong Took, Danilo P. Mandic

This article considers the problem of designing adaption and optimisation techniques for training quantum learning machines. To this end, the division algebra of quaternions is use…

stat.ML2023★ 3 cited

The HR-Calculus: Enabling Information Processing with Quaternion Algebra

Danilo P. Mandic, Sayed Pouria Talebi, Clive Cheong Took +4

From their inception, quaternions and their division algebra have proven to be advantageous in modelling rotation/orientation in three-dimensional spaces and have seen use from the…

cs.CR2018

Unsupervised Learning for Trustworthy IoT

Nikhil Banerjee, Thanassis Giannetsos, Emmanouil Panaousis +1

The advancement of Internet-of-Things (IoT) edge devices with various types of sensors enables us to harness diverse information with Mobile Crowd-Sensing applications (MCS). This…

math.NA2017

Simultaneous diagonalisation of the covariance and complementary covariance matrices in quaternion widely linear signal processing

Min Xiang, Shirin Enshaeifar, Alexander E. Stott +4

Recent developments in quaternion-valued widely linear processing have established that the exploitation of complete second-order statistics requires consideration of both the stan…

math.GM2014★ 125 cited

Quaternion Derivatives: The GHR Calculus

Dongpo Xu, Cyrus Jahanchahi, Clive C. Took +1

Quaternion derivatives in the mathematical literature are typically defined only for analytic (regular) functions. However, in engineering problems, functions of interest are often…