[{"observed_at":"2026-09-07 16:55:34.976737+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMzMzMyOTE0","source_instructor_id":"rmp:802342","instructor_name":"Andrei Caldararu","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2020-05-19 18:11:24 +0000 UTC","comment":"Andrei is very knowledgeable of the subject, and he is dedicated to his craft. He does not make the classes easy, and you really need to study to do well. I liked him, but he was really hard to read, and while his grading scale helped me in the end, he assigns grades at semester's end, so it is impossible to know how you are doing until the end.","source_url":"https://www.ratemyprofessors.com/professor/802342","quality_rating":4.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:46:15.648036+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMwODI3OTg1","source_instructor_id":"rmp:1852275","instructor_name":"Daniel Erman","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2018-11-30 18:17:58 +0000 UTC","comment":"Best professor I have had at UW Madison. If you have the chance to take a class with him, you really should. He's incredibly passionate but also very humble. Number theory could've been really challenging, but Professor Erman does a great job with the material.","source_url":"https://www.ratemyprofessors.com/professor/1852275","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:46:15.648036+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI4MzEyMTcy","source_instructor_id":"rmp:1852275","instructor_name":"Daniel Erman","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2017-05-15 05:34:45 +0000 UTC","comment":"If you want learning number theory to be fun, take it with Erman. He's one of the most exciting professors to learn from. He gives so many examples to cement your understanding, and also knows so many applications of number theory to other fields (i.e. cryptography, comp sci, etc..).","source_url":"https://www.ratemyprofessors.com/professor/1852275","quality_rating":5.0,"difficulty_rating":4.0},{"observed_at":"2026-09-07 16:43:27.660032+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI1ODQ2MTg2","source_instructor_id":"rmp:1769534","instructor_name":"Dmytro Arinkin","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2015-12-29 20:43:50 +0000 UTC","comment":"He is a good lecturer who does a good job at making some pretty difficult material approachable to undergrads. He did have one unit of material which was not found in the book, making it difficult to find a good reference outside of class for those concepts.","source_url":"https://www.ratemyprofessors.com/professor/1769534","quality_rating":4.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 16:43:27.660032+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTIyMjk1MzQ3","source_instructor_id":"rmp:1769534","instructor_name":"Dmytro Arinkin","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2013-11-11 21:05:28 +0000 UTC","comment":"Awesome professor. Extremely helpful and clear both in lecture and office hours. Exams are very close to samples. Homework problems were somewhat difficult but class was enjoyable with him. Found free legal pdf of our textbook.","source_url":"https://www.ratemyprofessors.com/professor/1769534","quality_rating":5.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 15:57:30.110885+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM4MDE1MTM4","source_instructor_id":"rmp:2539834","instructor_name":"Yousheng Shi","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2023-06-02 04:29:16 +0000 UTC","comment":"The grading cutoff for this course is so high unlike other undergrad courses. Lectures are dull, proofs are exactly the same as it is in the textbooks. You don't need to go to class, just read the book. Lots of homework and exam-heavy. Kind of stingy with extra points. His finals are usually extremely hard. Avoid him and take someone else.","source_url":"https://www.ratemyprofessors.com/professor/2539834","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 15:57:30.110885+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM3OTQ0NTEx","source_instructor_id":"rmp:2539834","instructor_name":"Yousheng Shi","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2023-05-17 15:14:43 +0000 UTC","comment":"Number theory is a tough course, so one assumes to have good background in abstract algebra. I think the department should also add Math 542 as its prerequisite since there is much more knowledge to be assumed before taking this course. Though I was not a big fan of the textbook selection since it contains no useful examples except Sage. ","source_url":"https://www.ratemyprofessors.com/professor/2539834","quality_rating":2.0,"difficulty_rating":3.0},{"observed_at":"2026-09-07 15:57:30.110885+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM3OTI0NjQ4","source_instructor_id":"rmp:2539834","instructor_name":"Yousheng Shi","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2023-05-15 06:04:05 +0000 UTC","comment":"He assigns lots of homework every week and he's very stingy about giving extra points. He is in favor of in-class exams; 2 midterms and 1 final. iI is a GPA killer since he seems to have no clear criteria about grading. The lectures are quite hard to follow as he skips so many steps. The exams are very hard; you need 90% to get an A.","source_url":"https://www.ratemyprofessors.com/professor/2539834","quality_rating":1.0,"difficulty_rating":5.0},{"observed_at":"2026-09-07 15:57:30.110885+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTM3NjI4OTA1","source_instructor_id":"rmp:2539834","instructor_name":"Yousheng Shi","course_label":"MATH567","course_id":"MATH 567","course_uid":"course_a75fa380f07449fe8cb71571","review_date":"2023-04-13 19:50:15 +0000 UTC","comment":"He comes down with arrogance when asked a question in class for some reason. The tests are unreasonably hard as he boasts about making the exams intentionally harder in class. The lectures are boring, and the proofs are sloppy but he expects you to do perfectly on the exam ... did not learn anything from his lectures. Waste of money ","source_url":"https://www.ratemyprofessors.com/professor/2539834","quality_rating":1.0,"difficulty_rating":5.0}]