Preface

This Book of Abstracts publishes the preliminary scientific contributions submitted for the 18th \nInternational Conference on Geometry and Graphics, celebrating the 40th anniversary from the first \nedition held in Vancouver at the University of British Columbia in 1978. \nAt that time it was the International Conference on Descriptive Geometry (ICDG), but in the second \nedition organized in Beijing in 1984, the name began to change, until the International Conference on \nEngineering Computer Graphics and Descriptive Geometry (ICECGDG) appeared in the 4th edition held in \nMiami in 1990, aiming at keeping the scientific event in step with the times, given the pervasive diffusion \nof the digital, and with the aim of widening the disciplinary spectrum of interest for the meeting. \nIn due course, the revolutionary power of the computerized geometry and graphics, and the new \nsensitivity towards the role of geometry and graphics in about every theoretical and operational field, \nclaimed for a more representative denomination, reflecting the ever widening thematics that the \nconference intended to pursue. \nThen, in 2000 the 9th edition was finally organized as an International Conference on Geometry and \nGraphics (ICGG), taking the name from the International Society for Geometry and Graphics (ISGG), \nconstituted in 1990 and promoting the event biannually at different venues around the world. By the way, \nI had the privilege to participate as a guest speaker in the Panel Session on The Taxonomy of Geometry \nand Graphics, which concluded the 8th edition held at the University of Austin in Texas, and contributed \nto the decision to give a new name to the Conference. \nThe references mentioned above maybe useful for those who are new to the ICGGs Conferences, will \nmore info can be found in the welcome addresses, as well as in a brief introduction to ISGG community \nand to ICGG dedication and logo at the beginning of the book. \nA series of scientific abstracts authored by the Guest Lecturers introduce the volume, representative of \nthe variety of topics and research inherent to Geometry and Graphics, carried out in the three regions of \nthe world, Asia/Australia/Oceania, Europe/Near East/Africa, North America/South America, according \nto the geographic areas mapped by the ISGG. \nAll the scientific abstracts submitted by the authors are organized by topics, namely Theoretical Graphics \nand Geometry, Applied Geometry and Graphics, Engineering Computer Graphics, Graphics Education, \nand the new topic Geometry and Graphics in History, proposed for this edition. Poster abstracts and the \ngraphic boards presented in the poster sessions at the Conference on the mentioned topics conclude \nthe volume. On the Conference website, available at the web address www.icgg2018.polimi.it, a series of \nsub-topics is also listed, together with a statement inviting prospective authors to submit papers even \nif not strictly related to the topics listed, which is consistent with the aim to promote Geometry and \nGraphics worldwide and in all the interested fields of research, education, industrial applications and \nprofession, as one can also read on the official webpage of the International Society for Geometry and \nGraphics at the web address www.isgg.net. \nThe full contributions, full paper and full posters, have been included in the Proceedings, published by \nSpringer, and indexed as Scopus records in the series Advances in Intelligent Systems and Computing. As well as the rich series of Forewords offered for this special edition, also published in this Book of \nAbstracts. \nAs in our tradition since 1997, an extended version of some selected contributions, recommended by the \nSession Chairs during the Conference, will also be published on the Journal for Geometry and Graphics \n(JGG), webpage www.heldermann.de/JGG/jggcover.htm. \nBeing the 40th anniversary of the Conference, we like to recall the preface to the first Proceedings \npublished in 1978, where professor Stephen Slaby of the Princeton University referred to the genuine \nspirit of geometry. As we can clearly see, this powerful spirit, and let us say, the spirit of geometry and \ngraphics, seems to be universally, and even strongly, confirmed nowadays. \nFor the reasons mentioned, this Book of Abstract is addressed to all the participants and guests who \nhave a direct interest in Geometry and Graphics, as well as in any fields, however related to Geometry and \nGraphics. For the same reasons it can be of interest for scholars, researchers, teachers, PhD students, \nstudents in general, as well as professionals. We also hope that the book may somehow reach other \nreaders, stimulating interest in Geometry and Graphics. The SCOPUS indexing provided by Springer \nshould be of help in this direction. \nThis publication is the result of the generous joint effort of a large community of authors submitting their \ncontributions; chairs and co-chairs, namely Yasushi Yamaguchi, Baoling Han, Ema Jurkin, Aura Conci, \nmembers of the steering and program committees, and reviewers, who have respectively led, supported, \nand collaborated in the reviewing process. \nThe local editorial activity has particularly benefited from the engagement of some members of the \nConference committee, who helped me in preparing the final editorial master, they are my colleagues \nGiampiero Mele, Daniela Oreni, Barbara E. Piga, Nicole De Togni, Matteo Romanato. I would also thank \nfor their advice the colleagues Raffaele Ardito, Dario Angelo Maria Coronelli, Damiano Cosimo Iacobone, \nRoberto Notari, Graziano Mario Valenti, and the Conference Staff and the Offices at the Politecnico di \nMilano in relation to the administrative aspects of the event. My special personal gratitude goes to Mrs. \nSarah Pye for the competent support in the translation of some key documents, and for her frequent \nprompt helps on the matter. And my students Matteo Cavaglià, Chiara Gargan, Innocent Hembi Hembi, \nFreeda Jane Madius, Aurora Moreschi, Hanxi Xie, Di Yan, Yangxing Zhang, for their admirable kind \navailability. \nHoping this book will offer you a pleasant immersion-test into the fascinating universe of Geometry and \nGraphics!

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