Maximal Planar Graph Theory and the Four-Color Conjecture
暫譯: 極大平面圖理論與四色猜想

Jin Xu is a tenured professor and PhD supervisor at Peking University, holding dual doctorates in science and engineering. With over thirty years of academic and research experience, Dr. Xu specializes in graph theory, biological computing, and neural networks--fields directly tied to the themes explored in this book.

An accomplished scholar, Dr. Xu has authored over 200 SCI-indexed papers as the first or corresponding author and led ten prestigious national research projects, including the NSFC, '973, ' and '863' initiatives. His groundbreaking work has earned the Second Prize in the National Natural Science Award and multiple First Prizes in the Natural Science Awards from the Ministry of Education and Hubei Province.

金旭是北京大學的終身教授及博士生導師，擁有科學和工程的雙博士學位。金教授擁有超過三十年的學術和研究經驗，專注於圖論、生物計算和神經網絡等領域，這些領域與本書探討的主題直接相關。

作為一位傑出的學者，金教授以第一作者或通訊作者身份發表了超過200篇SCI收錄的論文，並主導了十個國家級的重大研究項目，包括國家自然科學基金（NSFC）、'973'計畫和'863'計畫。他的開創性工作獲得了國家自然科學獎的二等獎，以及多個來自教育部和湖北省的自然科學獎一等獎。