[{"observed_at":"2026-09-07 16:57:02.487550+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQwODE5Nzk3","source_instructor_id":"rmp:2634041","instructor_name":"Alex Waldron","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2025-03-26 12:37:30 +0000 UTC","comment":"Great guy. He explains the content really well and is low key hilarious. Be prepared to do a fair amount of homework.","source_url":"https://www.ratemyprofessors.com/professor/2634041","quality_rating":4.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:57:02.487550+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQwNzAzNTEx","source_instructor_id":"rmp:2634041","instructor_name":"Alex Waldron","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2025-02-24 21:30:31 +0000 UTC","comment":"This site is a little too harsh. He explains things in a clear and concise manner and is quite helpful in office hours. However, he can come off as rude when answering questions.","source_url":"https://www.ratemyprofessors.com/professor/2634041","quality_rating":4.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 16:56:05.640539+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI2NTE2MDc0","source_instructor_id":"rmp:513807","instructor_name":"Amir Assadi","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2016-05-09 17:21:31 +0000 UTC","comment":"He is very inspirational, and very interested in his students and their success.  However, as a lecturer, he is not helpful as he takes several steps forward when most students need only one step.  Very advanced!","source_url":"https://www.ratemyprofessors.com/professor/513807","quality_rating":3.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 16:54:08.685189+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTEzODcxMzE3","source_instructor_id":"rmp:202881","instructor_name":"Arun Ram","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2007-12-19 01:55:40 +0000 UTC","comment":"THE GOOD NEWS: He explains everything thoroughly, in a way that is easy to understand. I definitely learned a lot. THE BAD NEWS: TONS of homework. Lots of late nights. Even when homeworks were started ahead of time","source_url":"https://www.ratemyprofessors.com/professor/202881","quality_rating":5.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:53:49.124835+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI0MTU2NDUy","source_instructor_id":"rmp:2216023","instructor_name":"Autumn Kent","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2024-04-25 13:50:13 +0000 UTC","comment":"Topology's not an easy subject, but he teaches it well and his lectures are helpful since he offers plenty of intuitive examples and doesn't mind taking time to answer questions. The only annoying thing about this course was that he never provides HW or exam solutions, which kind of suggests a lack of effort.","source_url":"https://www.ratemyprofessors.com/professor/2216023","quality_rating":4.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:51:37.641601+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM0MjY1Njgw","source_instructor_id":"rmp:2279567","instructor_name":"Botong Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2021-01-12 07:51:10 +0000 UTC","comment":"Topology is very difficult to understand on your own but Botong is the man and did a very good job explaining things--lectures were recorded, and he shared his lecture notes--which was super helpful so that I could just concentrate on understanding the content which is very nuanced. Exams were very fair. Homework was tricky but very manageable.","source_url":"https://www.ratemyprofessors.com/professor/2279567","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:51:37.641601+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMzNzQ5MzM2","source_instructor_id":"rmp:2279567","instructor_name":"Botong Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2020-10-29 20:23:58 +0000 UTC","comment":"Not sure why my experience with Botong is so markedly different than the other reviews. I thought he'd be great, but it pains me to say that he's not. You can tell that he cares, but the lectures are so unclear that attendance is at 30%. Endless "Proof is left to the reader," "I'll let you think about it," and "This should be really clear."","source_url":"https://www.ratemyprofessors.com/professor/2279567","quality_rating":1.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:51:37.641601+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMwNTUzNjY5","source_instructor_id":"rmp:2279567","instructor_name":"Botong Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2018-10-09 11:34:48 +0000 UTC","comment":"Sometimes he gets a little confused halfway through a proof and will start over, or will change notation halfway through a definition. Other than this he is an excellent instructor and gives great examples and makes theoretical map very tangible for students just being introduced to topology.","source_url":"https://www.ratemyprofessors.com/professor/2279567","quality_rating":4.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:51:37.641601+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI5MDM1Mzgx","source_instructor_id":"rmp:2279567","instructor_name":"Botong Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2017-12-04 15:49:16 +0000 UTC","comment":"Prof Wang is an expert in topology, and his 551 course is pretty reasonable. He gave only one midterm and a final, but the problems were a decent mix of old homework problems and new challenge problems. He can be pretty helpful in office hours, and it seems like he is primarily interested in the success of his students.","source_url":"https://www.ratemyprofessors.com/professor/2279567","quality_rating":4.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:23:54.846088+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM3NTU3NzE0","source_instructor_id":"rmp:1408142","instructor_name":"Laurentiu Maxim","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2023-03-30 00:56:55 +0000 UTC","comment":"No comment! He's a tough grader and makes you feel depressed in class. \nHe doesn't like giving extra credits and generally have very high expectations in exams. \nHe has his own way of writing a proof, so if he miss something, you will lose tons of points. \nNot a good professor at all.","source_url":"https://www.ratemyprofessors.com/professor/1408142","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 16:23:54.846088+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM3NDU2OTE2","source_instructor_id":"rmp:1408142","instructor_name":"Laurentiu Maxim","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2023-02-24 22:26:15 +0000 UTC","comment":"He has a condescending behavior toward his students, sometimes sarcastic. He has an accent which is sometimes hard to understand but the lectures are okay. Lots of homework and the exams are very hard with so little time. His expectations are a lot from students but his lectures or teaching do not meet that. Overall, stay away from him!","source_url":"https://www.ratemyprofessors.com/professor/1408142","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 16:23:54.846088+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM2NjM2MDM1","source_instructor_id":"rmp:1408142","instructor_name":"Laurentiu Maxim","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-09-10 04:26:26 +0000 UTC","comment":"MATH521!(cant create a new course code)\nNot much homework and not very hard exams as long as you really spend time on it.\nAlso gives extra credit for exams. Pretty good professor, I took it 22 spring, and it was his first time teaching 521","source_url":"https://www.ratemyprofessors.com/professor/1408142","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:23:54.846088+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM1ODkxMTE3","source_instructor_id":"rmp:1408142","instructor_name":"Laurentiu Maxim","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-03-01 01:56:51 +0000 UTC","comment":"he is an average lecturer. Hardly gives any extra credits on the tests. Kind of rude at times but it's okay.","source_url":"https://www.ratemyprofessors.com/professor/1408142","quality_rating":2.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:23:54.846088+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM1Njk3ODkw","source_instructor_id":"rmp:1408142","instructor_name":"Laurentiu Maxim","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-01-04 18:16:49 +0000 UTC","comment":"He is a good lecturer and does his best to explain the concepts clearly using lots of pictures. However, the course is graded by 30% midterm and 40% final and the rest is homework. If you don't do well on the midterm, then you will be probably get C or D since there is hardly a good curve. It's challenging to get a good grade. Overall average","source_url":"https://www.ratemyprofessors.com/professor/1408142","quality_rating":3.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:22:41.306571+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI5MjI4NDc3","source_instructor_id":"rmp:2099588","instructor_name":"Lu Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2017-12-15 22:33:48 +0000 UTC","comment":"She is really nice to students and helpful. Lectures are well organized, and proofs flow fluently. She gives motivations and time for students to actually think about the theorems. Will definitely take classes with her again!","source_url":"https://www.ratemyprofessors.com/professor/2099588","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:22:41.306571+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI2NDc4OTAx","source_instructor_id":"rmp:2099588","instructor_name":"Lu Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2016-05-05 14:56:47 +0000 UTC","comment":"Math major, have taken a lot of math courses. WORST EXPERIENCE EVER!!! Shows no respect in office hours. Hardly ever reply emails. Worst professor in Math department for unable/unwilling to explain the materials or any question. Rude and arrogant.","source_url":"https://www.ratemyprofessors.com/professor/2099588","quality_rating":1.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:22:41.306571+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI1OTY2ODc0","source_instructor_id":"rmp:2099588","instructor_name":"Lu Wang","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2016-01-19 23:18:02 +0000 UTC","comment":"extremely difficult final, you finish what you can do in half of the time and then just  looking at the paper, helpless","source_url":"https://www.ratemyprofessors.com/professor/2099588","quality_rating":4.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:20:46.034999+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQyNTI0Njc5","source_instructor_id":"rmp:2900916","instructor_name":"Marissa Loving","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2026-01-20 19:34:00 +0000 UTC","comment":"Prof Loving was extremely friendly and welcoming.  She was also a good lecturer, with extraordinarily nice handwriting and illustrative skills.","source_url":"https://www.ratemyprofessors.com/professor/2900916","quality_rating":4.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:16:53.463913+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTIyMDU0NjQ4","source_instructor_id":"rmp:1709676","instructor_name":"Mingzhong Cai","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2013-08-14 21:45:13 +0000 UTC","comment":"Professor Cai is awesome. I really enjoyed taking his class, largely because of his unique style. Exams are take-home but difficult--he told me I was the best student in the class, but I still needed 10+ hours to do each midterm. He gives proofs that differ from (and improve on) the book's, which is excellent. Overall, you can't do much better.","source_url":"https://www.ratemyprofessors.com/professor/1709676","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:16:53.463913+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTIxNzUyODYx","source_instructor_id":"rmp:1709676","instructor_name":"Mingzhong Cai","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2013-05-14 00:25:22 +0000 UTC","comment":"A good instructor for topology. His proofs are slick and intuitive, plus he is great at drawing pictures, which is pretty important if you want to understand what's going on, especially in algebraic topology. Exams were take home and difficult, homeworks were graded very tough. Overall a good teacher, but the grading was a little rough.","source_url":"https://www.ratemyprofessors.com/professor/1709676","quality_rating":4.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:16:19.143219+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTEzODY4ODQy","source_instructor_id":"rmp:1079222","instructor_name":"Mustafa Kalafat","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2007-12-18 21:25:21 +0000 UTC","comment":"Horrible prof. Showed up 5-10 minutes late nearly every day, so that probably added up to a week of class missed over the course of the semester. Pretty much just read right out of the book, so if you don't understand the book you're screwed.","source_url":"https://www.ratemyprofessors.com/professor/1079222","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 16:13:45.134618+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQwNDgyNzA0","source_instructor_id":"rmp:2306774","instructor_name":"Noah Schweber","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2025-01-04 21:36:40 +0000 UTC","comment":"Just a Rabbi tryin' to get by","source_url":"https://www.ratemyprofessors.com/professor/2306774","quality_rating":2.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 16:13:45.134618+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMxNzc2Njk2","source_instructor_id":"rmp:2306774","instructor_name":"Noah Schweber","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2019-05-05 20:59:49 +0000 UTC","comment":"Noah never stops during a lecture. He thought everyone was following just fine so he never ask us if we need any clarification. Many proofs in class was not complete and always "leave as an exercise". No in-class explanations on the questions from the midterm. Solutions to the homework after the midterm were never given. Office hr cancelled often.","source_url":"https://www.ratemyprofessors.com/professor/2306774","quality_rating":1.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:13:45.134618+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMxNzc2NTU5","source_instructor_id":"rmp:2306774","instructor_name":"Noah Schweber","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2019-05-05 20:41:44 +0000 UTC","comment":"Hoping his performance in high-level math course would be different from Calculus. Never mind. He can make good intuition for the material at the beginning and then go nonstop. Writing on the board faster than me writing with pen. Homework can be returned after 2 weeks of turning in and solutions for all not written until 3 days before the exam.","source_url":"https://www.ratemyprofessors.com/professor/2306774","quality_rating":1.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:12:56.376780+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQzMzQ2Njc2","source_instructor_id":"rmp:3142126","instructor_name":"Paige Hillen","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2026-08-05 07:02:06 +0000 UTC","comment":"Paige is a great professor for MATH 551. She explains difficult topology concepts clearly, keeps lectures organized, and genuinely cares about her students. Homework is fair and prepares you well for quizzes and exams, which are very manageable if you stay on top of the material. Definitely recommend taking 551 with her.","source_url":"https://www.ratemyprofessors.com/professor/3142126","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:12:56.376780+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQzMjEzMzUy","source_instructor_id":"rmp:3142126","instructor_name":"Paige Hillen","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2026-06-01 05:58:30 +0000 UTC","comment":"Wonderful professor! ","source_url":"https://www.ratemyprofessors.com/professor/3142126","quality_rating":5.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 16:12:56.376780+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQyOTg3ODI0","source_instructor_id":"rmp:3142126","instructor_name":"Paige Hillen","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2026-04-30 21:19:21 +0000 UTC","comment":"She's a great lecturer and very caring. The only gripe is that the homeworks/tests were pretty easy, so I feel like I didn't learn as much as I would of otherwise","source_url":"https://www.ratemyprofessors.com/professor/3142126","quality_rating":5.0,"difficulty_rating":1.0},{"observed_at":"2026-09-07 16:06:34.601176+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM2MzQyNTI0","source_instructor_id":"rmp:1029779","instructor_name":"Sean Paul","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-05-15 13:21:27 +0000 UTC","comment":"On the surface this dude seems nice and well-mannered, in reality he is also extremely intelligent and holds a deep love for mathematics. But I only have two questions: will he have one moment of sincerity? Does he really care about teaching an average student how to do proper math?","source_url":"https://www.ratemyprofessors.com/professor/1029779","quality_rating":1.0,"difficulty_rating":1.0},{"observed_at":"2026-09-07 16:06:34.601176+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM2MjgwMjU3","source_instructor_id":"rmp:1029779","instructor_name":"Sean Paul","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-05-08 22:20:17 +0000 UTC","comment":"Minimal assignments and fairly generous exams made the course more or less easy. Rather than focusing on rigor, emphasis was understanding motivations behind a few restricted topics about manifolds. A combination of poor communication, unique terminology, and divergent material from most topology courses made for a sometimes frustrating class. ","source_url":"https://www.ratemyprofessors.com/professor/1029779","quality_rating":3.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 16:06:34.601176+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM2MjU1OTg4","source_instructor_id":"rmp:1029779","instructor_name":"Sean Paul","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2022-05-05 20:08:43 +0000 UTC","comment":"What is he talking about in each lecture? It is impossible for you to learn anything with his scribbled handwriting and scarce examples!","source_url":"https://www.ratemyprofessors.com/professor/1029779","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 16:06:34.601176+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTIzMjg0NDAy","source_instructor_id":"rmp:1029779","instructor_name":"Sean Paul","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2014-05-20 11:59:16 +0000 UTC","comment":"Great professor. Really clear and to the point. However sometimes he's really fast and it can be hard to keep up with him but, he is definitely one of the best math professors at the university. Class was moderate in terms of difficulty. Would recommend.","source_url":"https://www.ratemyprofessors.com/professor/1029779","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:06:34.601176+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTIyODYxODEy","source_instructor_id":"rmp:1029779","instructor_name":"Sean Paul","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2014-02-23 23:47:11 +0000 UTC","comment":"worst professor ever among all math courses I have taken. Math teachers are supposed to be logically strict about every definition, thm and steps of proof. He is maybe the only math teacher who skips all accuracy","source_url":"https://www.ratemyprofessors.com/professor/1029779","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 16:05:53.065256+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTQyMzI1OTE4","source_instructor_id":"rmp:2933442","instructor_name":"Shengwen Gan","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2025-12-18 06:10:21 +0000 UTC","comment":"Professor Gan just... didn't seem to have a plan. Although he followed the textbook, there were certain parts he would skip. His proofs in class were identical to the ones in the book. His lectures were nothing special. Just utter meh. If you ask him questions outside of the scope of the course, he doesn't know unless it's analysis related","source_url":"https://www.ratemyprofessors.com/professor/2933442","quality_rating":3.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 15:58:25.641114+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTE0NDk0NzIw","source_instructor_id":"rmp:791230","instructor_name":"Xiuxiong Chen","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2008-05-19 17:00:58 +0000 UTC","comment":"Prof. Chen went to class probably less than I did. He was always at least 5 minutes late, or he had his grad students teach for him. Homework was never collected, he didn't understand the material, and because of his poor teaching skills, the grader gave everyone at least a BC. I like him, he's a nice, jolly guy, but he is a poor teacher.","source_url":"https://www.ratemyprofessors.com/professor/791230","quality_rating":2.0,"difficulty_rating":2.0},{"observed_at":"2026-09-07 15:57:37.183335+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTE4NzQ2NTcw","source_instructor_id":"rmp:310368","instructor_name":"Yong-Geun Oh","course_label":"MATH551","course_id":"MATH 551","course_uid":"course_7d3f055b392d74c588d35d0b","review_date":"2011-06-19 22:51:55 +0000 UTC","comment":"while a nice guy, his classes are extremely painful to sit through. he will often make mistakes, and not cover material but still expect you to know it. people eventually stop coming to class. his tests are okay.","source_url":"https://www.ratemyprofessors.com/professor/310368","quality_rating":2.0,"difficulty_rating":4.0}]