This special issue highlights particularly promising work presented at Genetic Programming events in 2019, including EuroGP’19 and GECCO’19 GP track. The European Conference on Genetic Programming (EuroGP) is the world’s only conference devoted to Genetic Programming (GP). The EuroGP’19 conference was held in Leipzig, Germany, in April 2019. The conference proceedings published 18 papers (12 presented through talks and 6 through posters) from 36 total submissions. The Genetic and Evolutionary Computation Conference (GECCO) is the largest conference in the field of Evolutionary Computation, and the flagship conference of the Association for Computing Machinery (ACM) Special Interest Group on Genetic and Evolutionary Computation (SIGEVO). GECCO-GP is one of the thirteen tracks, which specifically focuses on GP. The GECCO’19 conference took place in Prague, Czech Republic, in July 2019. GECCO’19 GP track selected 15 papers from 39 submissions for full-length publications in its proceedings. The goal of this special issue is to promote diverse and promising research being presented at the two major events in the field of GP. From each event, we selected three papers that were rated highest and considered the most inspiring as the result of our rigorous review process for both conferences. Their authors were invited to expand their original work and submit an extended version to this special issue. In the case of a conflict of interest between an editor and the authorship of a paper, the paper was handled by other editors. These submissions went through the journal’s extensive review process, re-reviewed by their original conference program committee members, as well as additional external reviewers. This ensures the highlighted

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2019年基因编程活动亮点专刊

本期特刊重点介绍了 2019 年遗传编程活动中特别有前途的工作，包括 EuroGP'19 和 GECCO'19 GP 赛道。欧洲遗传编程会议 (EuroGP) 是世界上唯一一个专门讨论遗传编程 (GP) 的会议。EuroGP'19 会议于 2019 年 4 月在德国莱比锡举行。会议论文集发表了 18 篇论文（12 篇通过演讲提交，6 篇通过海报发表），共提交了 36 篇论文。遗传与进化计算会议 (GECCO) 是进化计算领域最大的会议，也是计算机协会 (ACM) 遗传与进化计算特别兴趣小组 (SIGEVO) 的旗舰会议。GECCO-GP是十三条赛道之一，专门针对GP。GECCO'19 会议于 2019 年 7 月在捷克共和国布拉格举行。 GECCO'19 GP 跟踪从 39 篇提交的论文中选出了 15 篇论文，作为其论文集的完整出版物。本期特刊的目标是促进在 GP 领域的两大活动中展示的多样化和有前途的研究。我们从每场活动中选出了三篇评分最高且被认为是最鼓舞人心的论文，这是我们对两次会议进行严格审查的结果。他们的作者被邀请扩展他们的原始作品，并为此特刊提交扩展版本。在编辑与论文作者之间存在利益冲突的情况下，该论文由其他编辑处理。这些提交经历了该期刊的广泛审查过程，由他们最初的会议程序委员会成员以及其他外部审查员重新审查。这确保了突出显示的