Chenchen Song – författare

Syntactic categories constitute the core of grammatical theory, and this book examines their ontological structure across four levels of abstraction: individual categories, functional sequences, structured sets of sequences, and the comprehensive space of all possible functional-sequence sets.While prior studies typically focus on the second level, this work uncovers the intricate structures emerging at higher levels of abstraction. Central to its approach is the interplay between category-generating templates and some formal flexibility at each level, which together account for the diversity of syntactic categories. By exploring these template–flexibility pairs, the book integrates key topics such as functional hierarchies, root syntax, and category subtyping, advocating for a category-first perspective on syntax. Combining deductive reasoning with case studies that draw on data from diverse languages, it employs mathematical category theory to model the syntactic category system.This book is a valuable resource for linguists and researchers in syntax, theoretical linguistics, formal grammar, and typology. It also appeals to cognitive scientists and mathematical linguists exploring the structural foundations of language and cross-linguistic variation.

Mechanism of charge transport in organic solids has been an issue of intensive interests and debates for over 50 years, not only because of the applications in printing electronics, but also because of the great challenges in understanding the electronic processes in complex systems. With the fast developments of both electronic structure theory and the computational technology, the dream of predicting the charge mobility is now gradually becoming a reality. This volume describes recent progresses in Prof. Shuai’s group in developing computational tools to assess the intrinsic carrier mobility for organic and carbon materials at the first-principles level. According to the electron-phonon coupling strength, the charge transport mechanism is classified into three different categories, namely, the localized hopping model, the extended band model, and the polaron model. For each of them, a corresponding theoretical approach is developed and implemented into typical examples.