See https://qr.ae/TVdxq0

Paper A (Two efficient algorithms for linear time suffix array construction, https://scholar.google.com/scholar?as_sdt=0,5&btnG=&hl=en&q=...) is the main research field of Pro. Ge Nong (issng@mail.sysu.edu.cn, Sun Yat-sen University, Guangzhou, 中山大学). It is also his first paper in this field. Sequent papers relevant of him are all based on this one. Paper B is Space Efficient Linear Time Construction of Suffix Arrays(http://alumni.cs.ucr.edu/~rakthant/cs234/03_KA_Simple%20Line...). Paper A is found suspected of plagiarizing the idea of the algorithm of paper B.

Years ago, there were analyses by the researchers in the same field. See Suffix Array Construction: KA’s algorithm and Induced Sorting, which is faster?(https://yangzhe1990.wordpress.com/2012/11/04/ka-and-induced-...) It gives a very polite comment in English after analysis. And 最好写的suffix tree（suffix array）算法？(https://yangzhe1990.wordpress.com/2012/09/14/suffix-array-su...) The analysis in Chinese points out that Pro. Ge Nong's paper is suspected of plagiarism.

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In addition:

See https://qr.ae/TV09Mt

I started my Ph.D. program at the school of data and computer science, Sun Yat-sen University(SYSU, Guanzhou), in 2012. Student ID:12110646. I am one of the first batch Ph.D. students(total 2) of Pro. Ge Nong (issng@mail.sysu.edu.cn).

In 2012, after I entered into SYSU, Pro. talked to me times implying bribe demand, no avail. Then, I had to research alone for 7 years and must be close to his research field according to the clauses of the university, no direction, no advice, no machine, no support even there is national funding provided to the supervisor for each PhD student.

In Apr. 2019, in the case of meeting the requirement of graduation, my last chance to apply for the degree, Pro. Ge Nong refused to sign relevant documents. And the local police station was asked to treat me as a concerned-object after my complaint to the department head.

Later in Apr. 2019, I complained to the President's Office and the Office of Government Ethics of the university, then my thesis was sent out for review, by the department, later than all the other applicants.

In May 2019, after the review results of all the other applicants came out, the department asked me to cooperate with their investigation otherwise they would not let me know my review results. During the inquiry, they told me that I did not pass the review and asked me to write a declaration “The case of implying bribe demand with regards to Pro. is insufficient of evidence and falls short of facts”, otherwise I can only apply for the certificate of completion, not the certificate of graduation. Yield to the pressure, I had to give in.

In Aug. 2019, my thesis was sent out for review again. On Sep. 2, I was told that I did not pass the review again and can not continue the progress of graduation. Comparing with all the other applications of this time, the review time cycle of my thesis is abnormally different. The graduate school is suspected of operating under the table. Meanwhile, I was asked to apply for the certificate of completion by the department again.

In Oct. 2019, I was rejected to apply for graduation and asked to apply for the certificate of completion or withdrawal, and leave the campus. Otherwise, I would be dropt out with an official document promulgated by the university.

In the case of meeting the requirement of graduation, the whole process of my application for graduation suffered resistance and backroom operation time and time again from the beginning, just because of not meeting the professor’s bribe demand, and about to being dropt out by the university in the end. I do not know whether all the thing is normal. I either do not know whether Pro. Ge Nong is qualified to be a teacher.

The issues were complained to the Ministry of Education of China in early Sep. 2019. I am waiting for the reply.

Appendix

1. Different from many kindred tragedies, I am an alive sample at present and suffering from institutionalized pressure and threat. Two places of names in the post are hidden for circumventing illegal persecution in the name of law.

2. Any legal aid is appreciated.