================ Acknowledgements ================ * EU: The research leading to these results has received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation program / ERC Advanced Grant E-DUALITY (787960). This paper reflects only the authors’ views and the Union is not liable for any use that may be made of the contained information. * Research Council KUL: Optimization frameworks for deep kernel machines C14/18/068. * Flemish Government: * FWO: projects: GOA4917N (Deep Restricted Kernel Machines: Methods and Foundations), * PhD/Postdoc grant: This research received funding from the Flemish Government (AI Research Program). * All the authors are also affiliated to Leuven.AI - KU Leuven institute for Artificial Intelligence, B-3000, Leuven, Belgium. .. |European Union| image:: ../../img/eu.png :width: 200 :alt: European Union .. |European Research Council| image:: ../../img/erc.png :width: 200 :alt: European Research Council .. |Fonds voor Wetenschappelijk Onderzoek| image:: ../../img/fwo.png :width: 200 :alt: Fonds voor Wetenschappelijk Onderzoek .. |Flanders AI| image:: ../../img/vl.png :width: 200 :alt: Flanders AI .. |KU Leuven| image:: ../../img/kuleuven.png :width: 200 :alt: KU Leuven