**Lectures and Seminars**

- ``Complex-Valued Neural Networks'' at Akita Prefecture, Japan, May 24-25,
2007

- ``Complex-Valued Neural Network and its Properties'', the Society of Instrument
and Control Engineers (SICE), Neural Network Forum, University of Fukui,
Jan. 23, 2010

- ``Learning Dynamics of a Complex-Valued Neuron with the Parameters Represented
by Polar Coordinates''，FAN 2010 Symposium at Tokyo Metropolitan University，Septmber
25-26, 2010.

- ``Widely Linear Estimation for High-Dimensional Signals''，First SICE Symposium
on Computational Intelligence at Kyoto Institute of Technology，Septmber
30, 2011.

- ``Construction of Neural Networks without Critical Points Based on Hierarchical
Structure''，Second SICE Symposium on Computational Intelligence at Okayama
University，Septmber 28, 2012.

- ``High-Dimensional Neurocomputing''，First lecture class of the Research
Committee on Adaptation and Learning Approaches to Systems and Control
(SICE Control Division) at the Institute of Statistical Mathematics, December
13, 2012.

- ``High-Dimensional Neural Networks''，Second lecture class of the Research
Committee on Adaptation and Learning Approaches to Systems and Control Based on Ubiquitous Computing
(SICE Control Division) at the Institute of Statistical Mathematics, December 7, 2015.

- ``Learning Charasteristics of Deep Complex-Valued Neural Networks''， Proc. the 9th SICE Symposium on Computational Intelligence, pp.42-49, Chiba University，July 9, 2016

- ``Resolution of Singularities via Deep Complex-Valued Neural Networks''，
Empowering Novel Geometric Algebra for Graphics & Engineering Workshop
(ENGAGE), Yokohama, June 27, 2017.

- ``Hyperbolic Gradient Operator and Multilayer Hyperbolic Neural Networks''，
Fukuoka University Seminar, Fukuoka city, Japan, Jan. 16, 2020.

- ``High-Dimensional Neural Networks''，Tokyo Woman's Christian University, Japan, Dec. 7, 2022.