MATH 171

Stochastic Processes

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Tonci Antunovic Full Profile > N/A Overall N/A Easiness N/A Workload N/A Clarity N/A Helpfulness
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Noam Berger Full Profile > 2.8 Overall 1.5 Easiness 1.5 Workload 2.5 Clarity 2.2 Helpfulness
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Overall 2.8 Easiness 1.5 Workload 1.5 Clarity 2.5 Helpfulness 2.2

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Marek Biskup Full Profile > 2.7 Overall 1.7 Easiness 2.0 Workload 2.7 Clarity 3.0 Helpfulness
咋不上天呐 囧 (Winter Quarter 2016)
Marek Biskup See Full Profile

Overall 2.7 Easiness 1.7 Workload 2.0 Clarity 2.7 Helpfulness 3.0

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咋不上天呐 囧

Winter Quarter 2016
Nestor Guillen Full Profile > N/A Overall N/A Easiness N/A Workload N/A Clarity N/A Helpfulness
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Steven Heilman Full Profile > N/A Overall N/A Easiness N/A Workload N/A Clarity N/A Helpfulness
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Mikhail Hlushchanka Full Profile > N/A Overall N/A Easiness N/A Workload N/A Clarity N/A Helpfulness
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Sangchul Lee Full Profile > 3.0 Overall 4.0 Easiness 3.0 Workload 3.0 Clarity 4.0 Helpfulness
okay professor (Winter Quarter 2021)
Sangchul Lee See Full Profile

Overall 3.0 Easiness 4.0 Workload 3.0 Clarity 3.0 Helpfulness 4.0

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okay professor

Winter Quarter 2021
Thomas Liggett See Full Profile

Overall 2.8 Easiness 1.8 Workload 1.5 Clarity 3.3 Helpfulness 3.8

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Liggett is a very good professor. But he is sooo difficult. Fainting level difficulty! I'm taking him for 171 while taking Math 170B Math 131A. My feeling that 171 with liggett is more difficult than Math 170B with Chayes and Math 131A with Stovall combined times 2... I literally spent all my time studying for Liggett (almost crying, occasionally) and I still got a B, while getting A for 131A from Stovall (people say she is hard, but her 131A is sooo easy compared to Liggett's 171).

June 27, 2011
Hanbaek Lyu See Full Profile

Overall 4.0 Easiness 4.0 Workload 4.0 Clarity 3.0 Helpfulness 3.0

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The class is fine, but far from good. Hanbaek is a decent professor, who is nice and chill. However, he arrives at class six minutes late on average, and don’t care about that at all. His lecture notes are good, but with some minor notation confusion, so there is no need to attend every class (he basically copies his lecture notes in class). Tests are fair, but the final is too easy as a take home final (class average is around 91%).

Winter Quarter 2020
Hung Nguyen See Full Profile

Overall 5.0 Easiness 2.0 Workload 3.0 Clarity 5.0 Helpfulness 5.0

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GENERAL WARNING: Though not listed as a prerequisite, make sure to take Math 131A or equivalent before taking this course, as there are proofs that involve the limits of sequences and series as well as exchanging limits and unions/intersections, summation/integration, etc. I believe these rigorous aspects are a part of the course regardless of the instructor, so having knowledge of relevant topics is really necessary.
Another general comment: Stochastic processes are, based on my limited knowledge of math, a very deep subject. Having taken honors math upper divs and some grad courses (in applied math, though), I could feel that some aspects were deliberately left out in the textbook and/or lectures as they involve more advanced knowledge in e.g. real analysis (more precisely, measure theory as I would guess). That being said, the course contents are still pretty well presented in both the textbook and Dr. Nguyen's lectures.
Textbook: Written by Prof. Rick Durrett at Duke University and completely free (available on his personal website). A very well-structured book with more than enough examples, which is good for understanding, but at the same time, it is a good idea to take notes in class and/or make notes of the important results, as they tend to scatter all along the way in the textbook.
Grading: 25% HW + 5% Discussion Attendance + 25% Midterm + 45% Final. Towards the end of the quarter, another grading scheme was added: 25% HW + 5% Discussion Attendance + 10% Midterm + 60% Final. The syllabus says that the class is not curved in either way, but I speculate that we got curved up a bit.
Lecture: In person, but lectures were recorded, at first with Zoom installed in the classroom but the quality was very bad, so he switched to his phone after a week or two. The lectures are very clear and at a reasonable pace, though I find them a bit slow sometimes. He went through important proofs and examples step by step, which is very helpful. The only caveat is that one concept or two showed up in HWs that he did not cover in class, so once in a while you need to read the textbook on your own.
Homework: Combination of textbook problems and self-written ones. I think they are well picked/written, as they either serve as good practice of using formulas covered in class, or ask you to prove important results (with reasonable difficulty) that appear later in the course or on the exams. Some problems took plenty of time to think about, but it is very rewarding once you figured out the key point. There were nine sets of five problems in the first eight, but the last homework due on the final day of instructions had nine problems, which was actually a bit too many.
OH: Dr. Nguyen is very happy to answer questions and read your work on the HW and help you write better solutions/proofs during office hours.
Exams: 1 midterm + 1 final. Both exams were in person and a bit pressing on time, with the final more so. The distributions of scores turned out to be okay. Having a good understanding of the lectures and homework problems is essential, especially considering that there is not much time to be at a loss or fix mistakes.
Overall Dr. Nguyen is a very great instructor for this course. Due to its challenging nature, our lecture ended up having just short of 20 students, but Dr. Nguyen is very willing to help and I felt I learned a lot in his class.

Fall Quarter 2021
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