This special issue contains extended versions of four selected papers from the 11th International Conference on Graph Transformation (ICGT 2018). The articles cover a tool for computing core graphs via SAT/SMT solvers (graph language definition), graph transformation through graph surfing in reaction systems (a new graph transformation formalism), the essence and initiality of conflicts in $\mathcal{M}$-adhesive transformation systems, and a calculus of concurrent graph-rewriting processes (theory on conflicts and parallel independence).

中文翻译：

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第十一届国际图变换会议特刊的序言

本期特刊包含来自第11届国际图转换大会（ICGT 2018）的四篇论文的扩展版本。文章涵盖了通过SAT / SMT求解器计算核心图形的工具（图形语言定义），通过在反应系统中进行图形浏览进行图形转换（一种新的图形转换形式主义），冲突的本质和初始性。$\mathcal{中号}$-粘性转换系统和并发图形重写过程的微积分（有关冲突和并行独立性的理论）。