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I learned a lot from this class. I am looking forward to attend another class with you through my PhD. The topics covered in this class were helpful and well explained. This Prof was smart and capable of the class.","source_url":"https://www.ratemyprofessors.com/professor/2281992","quality_rating":5,"difficulty_rating":1},{"observed_at":"2026-09-07 16:30:28.756583+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMyMTAwMzk3","source_instructor_id":"rmp:2281992","instructor_name":"Joris Roos","course_label":"MATH629","course_id":"MATH 629","course_uid":"course_bac5b63415c0e4cd6d5c3848","review_date":"2019-07-16 16:05:50 +0000 UTC","comment":"Joris is truly an amazing guy!!! His lectures are very detailed, structured, and well-explained. His homework is generally not easy, but if you put in some effort you will be fine. But the exams are easy, they are just direct applications of some important theorems. He is really the BEST math professor I've ever had here!! PICK HIM guys!!","source_url":"https://www.ratemyprofessors.com/professor/2281992","quality_rating":5,"difficulty_rating":4},{"observed_at":"2026-09-07 16:30:28.756583+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMxMjEyODI0","source_instructor_id":"rmp:2281992","instructor_name":"Joris Roos","course_label":"MATH522","course_id":"MATH 522","course_uid":"course_0dd25611eebe714d971b7bfb","review_date":"2019-01-07 05:00:53 +0000 UTC","comment":"Math 522 was one of the hardest courses I've ever taken period but I learned sooo much and found it super worth it. We used mostly notes that he provided that I found extremely clear. Tests were straight-forward applications of the most important theorems. Lectures went directly through the notes and I always regretted missing lecture. Hws tough","source_url":"https://www.ratemyprofessors.com/professor/2281992","quality_rating":5,"difficulty_rating":5},{"observed_at":"2026-09-07 16:30:28.756583+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMxMTU4ODU5","source_instructor_id":"rmp:2281992","instructor_name":"Joris Roos","course_label":"MATH522","course_id":"MATH 522","course_uid":"course_0dd25611eebe714d971b7bfb","review_date":"2018-12-26 22:23:28 +0000 UTC","comment":"Indeed Roos provided the most detailed lecture materials among all the courses I took this semester though he is a tough grader. He prepared for the class very well and kept updating the notes on his webpage, it was quite convenient and clear. Midterm is toughly graded but if you read the theorm carefully you will be ok on the final.","source_url":"https://www.ratemyprofessors.com/professor/2281992","quality_rating":5,"difficulty_rating":4},{"observed_at":"2026-09-07 16:30:28.756583+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTMxMDYyMTIw","source_instructor_id":"rmp:2281992","instructor_name":"Joris Roos","course_label":"MATH522","course_id":"MATH 522","course_uid":"course_0dd25611eebe714d971b7bfb","review_date":"2018-12-17 09:21:42 +0000 UTC","comment":"Indeed, he is a tough grader and homework is really hard, but hey, this ain't a top 20 program for no reason. Read the lecture notes and understand them well, and you should be fine. He will grade even tougher if you use notation he didn't define, so don't do it, be precise. 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