professor


Nov 2019 
DO NOT TAKE: I honestly don't understand how he's a silver nugget MuTao Wang teaches this entire course reading off of slides that are copypaste from the textbook (some were just screenshots). He doesn't actually teach the class, and maybe half of us gave up attending lectures. He posts the slides on CourseWorks after each class, but there's really no point considering you already have the textbook from LibGen or something. Then, reading the textbook and doing its practice problems barely help with the exams. He loves proofrelated questions, and the exams were extremely difficult. The curve was poor, but the fact that the class was under 30 people played into it. Really, the only people in this class are those who are required to finish the Calculus sequence. This is a nitpick, but he likes to pace around the room during the exams (yes, he proctors them himself), and  unlucky me who sat in the aisle  I found it unnerving that he would walk by and glance down at my work several times throughout the exam. If you have the option, take a different Calc IV.
May 2014 
This is absolutely a worthwhile course to take if you have the necessary prerequisites and are thinking of becoming a math or sciences major. Don't be put off by NSOP's awkward avoidance of the Honors sequence  if you're interested in proofbased math and up for a bit of a challenge, try it on for size. Like several students in Honors Math, I took both linear algebra and multivariable calculus in high school, so I very much appreciated a differentlymotivated and more rigorous perspective. And this course will prepare you for upperechelon math courses like no other. For example, MuTao starts the first semester defining fields and finitedimensional vector spaces, definitions traditionally seen first in abstract algebra, and often uses functional notation rather than matrix notation for linear transformations. In the second semester, Prof. Wang introduces you to analysis with the completeness of the real number system, and throws quite a few bones to topology along the way. As a previous reviewer noted, MuTao is an excellent, excellent lecturer. He structures and organizes effortlessly, he tries to develop intuition (especially geometrically; as a analytic geometer he's also an accomplished sketch artist), he proves almost everything he states in a way that's easy to understand  and he responds well to questions. He's also very friendly and helpful in office hours. Homework assignments are due every class (the assignments due after the weekend are generally longer, 2~4 hours instead of 1~3). In the first semester, most of the problems are MuTao's own, but a couple of weeks into the second, all of them come from Apostol. With that shift comes a shift away from rigorous proofs and towards problemsolving. Additionally, the cramming of all of Calc III & IV into the second semester may at times feel a bit rushed. But all in all, this is not a difficult course to follow if you put your mind to it. Exams are all inclass and can be tough to complete at times, but Prof. Wang understands this and grades generously. As the previous reviewer noted, there's a good mix of problems, so you can play to your strengths, but there's not a lot of correlation between the material on problem sets and the material tested on the exams. That said, do the homework anyway because it'll enhance your understanding of the material from in class. Then when an exam comes around, do the practice exams, go to the review sessions (one before each exam in addtion to regular weekly recitation), and reread your notes  you'll be good.
May 2013 
Overall, I walked away pretty happy with this course. Based on reviews of previous iterations of the course, it sounds like this one wasn't nearly difficult was the killer courses with Savin and Friedman. It follows the second volume of Apostol's textbook very closely, and served as coverage of linear algebra and multivariable calculus, and basic proofs. Since multivariable calculus is covered in two separate courses, calculus 3 and calculus 4, taking this class is a good idea if you want get the material out of the way in a single semester. Professor Wang was an excellent lecturer who covered material very thoroughly in class. He moved quickly, but he was very thorough and wrote down everything that was important on the blackboard. He did tend to focus on long proofs that were never to be seen again, but he also did a great job conveying the intuition behind the material. Homework was assigned twice a week every week, and the length of the homework varied a bit, but it usually didn't take too long. The assignments were almost always out of the book, and this was probably the biggest weakness of the course, because the problems in the book were generally not all that great. During the first semester, when we did linear algebra, they were generally decent. During the second semester, when we covered multivariable calculus, some of the problems required excessive tedious algebra without having much value or relating to what we were emphasizing in class. There were three times when the professor wrote his own assignments that were not from the book, and honestly these were the most interesting and relevant assignments that we had. It would've been nice to have more proofs assigned during the second semester, where the homework assignments were almost entirely computational. The exams were very fair. Usually 40% of the points came from true/false questions and the remaining 60% of the points came from longer problems. There was usually a good mix of computations, conceptual problems, and short proofs. Usually the average was between 70 and 80. He clearly didn't design the exams with the intention of them being brutal and the averages being very low, as he expressed disappointment when the average was in the low 70s. He is also very good at writing problems that simplify very neatly, and is not interested in making the students crank through a lot of tedious algebra on the exams. He also does not penalize students multiple times for the same mistake, and if a problem has multiple parts, missing one does not imply you won't be able to do the later parts. The most relevant preparation for the exams was the practice exams that he provided beforehand, for which solutions were provided, and he or the TA worked them out in a review session the night before the exam. Seriously, these were golden. The exams weren't copies of these, but some of the questions on exams did emphasize similar points (that might not be seen in the homework) and got you thinking in the right direction. Comparatively, the homework was not very helpful for exam preparation.
Jan 2010 
This was a painless, if quite dull, class and a good section. MuTao was a nice professor who tried to make the tedium of regular singular point series solutions at least bearable. He had his work cut out for him, and sometimes I'd catch myself falling asleep. His accent was not terrible after a few classes, once you got used to it. The material is very applications heavy, as you'd expect from an "engineering" ODEs class. You'd learn how to recognize many different types of ODEs and how to solve them, rather than spending time learning why the methods you choose work. I'd say take that into account while picking classes, but since this class is a requirement for many majors, I'm not sure there's much of a point in doing that (although there is the 3027 ODEs class). I honestly don't feel like I learned that much after the class, but I'm not sure if that's a function of the professor or of the class. I suspect the class, and so I'd recommend MuTao as a good professor with whom to finish this requirement.
Aug 2007 
Nice guy and energetic in class but if you don't understand the textbook chances are you won't understand all the multivariable stuff he's writing on the board. he write copious notes, theorems and proofs, but it's mostly by the book. class size is usually large (90!) so there's not much time to address individual questions. if you don't understand something, better go to the TAs or his office hours. NO LATE HWS (weekly!) and Weekly quizzes but no sweat everyone does poorly. Exams are difficult even if you study, unless you remember the theorems and happen to be really REALLY good at math. So, don't take this class unless you have to.
Jul 2007 
Alright, here's the deal guys. Mu Tao Wang is an awesome professor. Just too hard. If you are not a proof based guy, get the hell out of this class. If you like proofs, Wang will be fun and challenging. There are a lot of other professors that teach the same course and people get easy A+. Unless you're brilliant, chances of getting higher than a B+ are very slim.
Apr 2007 
More of a theoretical class than your typical slackoff class where you get easy word problems, this class is for people who are good at math and physics, or adept at logical reasoning. Be confident of your math skills if you want to take this class. Highly stressful, as the averages were low but the curves weren't very helpful because of math/engineer people who scored very high. You may not learn much if your foundations are not solid and if you don't really want to add to your theoretical math knowledge.
Feb 2007 
The thing with Professor Wang is that you have to 'get' him. I had a tiny bit of a nasty shock going in because he teaches Calc III like he does the honours math course  lots of proofs and theorems along with the 20 examples he goes over every class period. I admit it is sometimes like running next to a motorcycle trying to keep up with him, as most of the 75minute lecture consists of frantically scribbling down his notes on the blackboard (each of which he reuses at least six times during the period). Still, it is not fair to say that the class was unpleasant. Wang was always punctual, prepared and ready to lecture. He speaks perfect English with a bit of an accent, though it took me a while to figure out that 'reco' meant 'recall'. He has that dorky math professor type humour and even took a stab once at the annoying kid we all wanted to shoot spitballs at. Definitely a sure way to pass the time quickly. Lectures are really important. I felt like I would miss out a lot if I skipped even one lecture, since he covers so much. Also, Calc III with Wang is more difficult than with other professors  there is a LOT of mathematical theory that requires you to have intrinsic knowledge of to not get lost. Other classes covered more, but I figured Wang was going for depth and understanding more than a finish line. He is crisp, articulate and very very organized  and he actually wants you to LEARN something, not just solve equations robotically (hence all the theory). He's also extremely nice in his office hours. The only annoying thing is the weekly quizzes, which are really difficult. Luckily, they don't count for much. Curve and final saved my lessthanmediocre quiz and midterm grades.
Jan 2007 
Prof. Wang was an excellent nofrills mathematics professor. He was very focused and wellprepared, lecturing from notes while ocassionally adding extra insight. Obviously understood his stuff and was able to communicate it clearly to the class, stepbystep. He answered questions thoroughly and also reviewed a bit of the previous class at the start of every new lecture, which was very helpful. Although some have complained his lectures went too quickly, I found them just fast enough to stay challenging and keep you on your toes. There were also some moments of surprising hilarity that livened up the class once in a while. Prof Wang's lectures will teach you the material, and reviewing the textbook afterward is all that's needed to reinforce key concepts. He's very good and you'll learn what you need to know about calculus.
Jan 2007 
Professor Wang was, all in all, a very good teacher whom I would take again. His accent is nothing to worry about, very easy to understand, and his writing is clear if you miss a word or two. From what I heard, he was a bit harder than many of the other Calc III professors, and moves a rapidly through the material without using many concrete examples. However, he is good at explaining the principles, and willing to help if help is asked for. He also tries to make the class a bit fun, cracking the occassional joke when it gets too serious. A word of warning, however; he sets down basic guidelines and intends to follow them. Late homework is not accepted.
Jan 2007 
MuTao is actually a pretty good teacher. You should sit in the front though because with his Chinese accent you might not be able to understand him that well and it'd be better to sit up front and take notes. He writes everything down on the board, but most of his notes are just proofs. He opens up towards the end of the semester and really just wants you to learn Calculus, so no matter what, raise your hand if you have a question. As long as you put SOME effort in, really listen in class (or at least take down all his notes), and do most of the HW and all of the practice midterms/finals, you can pull off at LEAST a B in this class.
Jan 2007 
Everyone wrote that he's great so I took him. He's not bad but not excellent. He's quite approachable. And his best quality is his lack of strong accent. He is clear with his examples and he curved to a B.
Dec 2006 
Teaches straight out of the textbook (which is horrible at explaining concepts). His 1 hour 15 minute lecture is simply copying pages of notes while he explains. Accent does not pose a problem, but his speed does. It is best to read the material in the textbook to learn anything. Supposedly his section is easier than other professors', so if you are willing to work hard, you will do very well.
Dec 2006 
As compared to the other calc 3 professors during my semester, Prof. Wang was by far the hardest. The homework was hard, the weekly quizzes were hard, and the two midterms were hard. On the upside, he is a great professor who really tries to get students to understand. His english is fine also a bit amusing when he says alpha or delta. About 3040% of the students dropped out of the class. The curve is slightly on the bad side because all the smart people stayed in the class... The really nice upside is his final was very easy, so easy makes me wonder if he has something up his sleeve. He has a great sense of humor, that corny teacher humor. I'm not sure if I would recommend him for the average columbia math student. decided for yourself.
Apr 2005 
Professor Wang is by far the best mathematics professor I have ever had. He can reduce the incredibly complex presentation of Apostol's Calculus to concrete, useful examples and provides much better, cleaner proofs than those in the book. That said, these classes are hard. When you think that they can't get harder, they do. Multiple problems from Apostol are misprints and cannot be solved but in failure, you will learn more about the process of solving these problems than otherwise. The bad part is his annoying habit of assigning problem sets on Thursday evening to be due on Monday. It really messes with your schedule. I will be taking as many classes with Professor Wang as I can.
Nov 2003 
I want to agree with everything else that is said and add to it a little bit. Professor Wang is an excellent math teacher. The only bad part about this class is the homework. It takes about 45 hours to do a week (sometimes even longer) but the midterms seem to be a step below what is asked on the homework so if you do fine on the homework you will do well on the tests. I definately reccommend him as a teacher and would take any class in the future that he is teaching.
Nov 2003 
Absolutely the best math professor I've ever had. The thing that puts him above the rest is that he explains what you are doing when you are proving an equation, or anything like that. Other professors don't do that, they just do the proof. Wang makes math both understandable and interesting.
Sep 2003 
Imagine the best math teacher humanly possible. Okay, Wang is a notch or two BETTER! He explains everything from the bottom up (it's impossible to "get lost" along the way), and always stops for questions. Don't be afraid of his Asian appearance; Wang is quite articulate and he even speaks at an audible volume. I only wish I'd had him for every math class since 1st grade. I challenge anyone to take this class without enjoying it and its patient, gentle, thoughtful professor.
Aug 2003 
I think Prof. Wang's English was just fine. I heard nothing that was hard to understand and never needed him to repeat anything in class. He is generally aware of the class and will stop and go over something if he senses that people aren't keeping up. He seemed like a very nice Prof., though I never went to see him after hours (I did talk to him a few times after class). Having heard the horrors from a couple of friends taking Calc1a at the same time as me, both with difference professors, I would highly recommend Prof. Wang. Fair, nice, easy to understand. Need I say more?
May 2003 
Professor Wang was by far the best math professor that I have ever had. He has an accent, but he is still understandable. His lectures were well organized with excellent notes on the blackboard. The homework can be difficult, but he always took time in the next lecture to cover difficult problems. If you struggle with math, he's the right teacher. Besides, the midterm and final problems were taken from the homework, so if you do the work, you'll be fine.
May 2003 
As yet another Honors III dropout, I have to say that what both the other Honors reviewers said was true. The class started with about 22 people, when it ended I think there were 8. The textbook we used was full of errors. Beware of taking this class without a STRONG math background, or else be willing to work and study HARD  or else be a genius. Any of those (especially the first and last) will do. I am a math major (and I love math!) but this was too much for me. It's not like high school where you can always take the hardest course available.
Aug 2002 
As an Honors Math dropout, I can say that most of what the other guy said is very true. I would probably add a couple things. Though, MuTao Wang's English is passable, our TA could not speak English for shit, which is a pretty big problem if you need him to explain stuff. The homework is not consistently difficult. Usually it will be a lot of easy (somewhat timeconsuming) problems, and then one or two problems that are a real kick in the balls. I remember one time MuTao assigned this impossible proof. At the recitation, the TA said, "This was solved by the famous mathematician BLAH BLAH BLAH ... so let us follow him." And I was thinking, "what if I hadn't shown up for the recitation? Does he REALLY expect us to singlehandedly accomplish a proof that only some famous Russian guy could do?" I didn't understand the TA's explanation either, because, as I said, his English sucked. That's when I left. So, if my experience is any indication, I would say this class is definitely not for the casual math enthusiast (like myself). Even though I got A's in BC Calculus and a 5 on the exam (booyah), I was definitely out of my depth. Even my exgirlfriend, who was brilliant in math and took the exact same class at Yale (the textbook was written by a Yale math professor) said the class turned her off to the subject. What the other guy says about "theoretical underpinnings" is true. If you take this class, you won't learn multivariable calculus or linear algebra. Really. You won't even see numbers that often. My exgirlfriend, who took the class both semesters, feels like she didn't learn anything. I would agree with this guy that you should only take this class if you are very serious about math, and definitely going to major in it. But even if that is the case you should probably take calc 3s and linear algebra at the same time as the honors class. I always got the impression that the class tacitly assumed a prior knowledge of these subjects. Though the math department says you should start with Calc 2s if you took BC in high school, that's bullshit. The first half of that class is stuff you already learned (like improper integrals and series) and the second part is incredibly easy. You could teach yourself everything in that class that you haven't yet learned in a few hours, a weekend at most. Again, I speak from experience. I took Calc 2s the following spring. It's cake. So the bottom line is, you should only take this class if you're definitely going to be a math major, and even if you do take it, you should supplement it with Calc 3s and Linear Algebraunless you are some math prodigy who already studied that stuff in high school, in which case you're good to go.
Aug 2002 
Before you even THINK about taking this class (with or without Prof. Wang) ask yourself this question: "Am I going to be a Math Major?" If you answered "no" or "maybe" then don't take Honors Math, take IIS. In addition to being very difficult, this course is abstract and proofbased to an extreme. I feel like I have an excellent understanding of the theoretical underpinnings of linear algebra and multivariable calculus. If I were required to say... build a bridge using my knowledge of the subjects, I would be absolutely hopeless. There are NO applications in this class, this class is all proofs and abstract concepts. Having said that, this was the best math class I've ever had in my life. I am a math major, I love proofs, and I don't really care for the practical applications of math. Prof. Wang gets a B+ on English (it's not at all an obstacle) and an A for everything else. He's approachable, willing to repeat himself, available after hours, and willing to reschedule a takehome midterm for you because you have tickets to see the Dismemberment Plan that night. The workload is hard, but fare, and he knows that the students in his class are working hard and shouldn't be making Cs. The bottom line is: if you're serious about math, love doing really difficult proofs, and willing to work, then by all means TAKE THIS CLASS! However, on the first day of class there were 40 students. Only 11 stuck around for the midterm. It's a hard class, that is not what most students are after, and if you think you fall into this category, IIS is a much better class for you.
Mar 2002 
MuTao was definitely a pleasant surprise as math teachers go. Don't be scared off by the foreign name; he speaks English very well, and his handwriting makes up for the very occasional deficiency. His explanations were generally pretty helpful and clear, and he always tried to be receptive to questions in class. Tests were fair. It certainly wasn't exciting, but it had pretty much everything you look for in a good math class.
Nov 2001 
A rare Chinese Math professor who speaks good English. Eloquent and clear lectures. Thoroughly knowledge of material. Reasonably responsible and responsive. Not extremely nice but never mean. Harvard PhD but not arrogant. Overall a good professor and extraordinary compared to the others in the Math Department.
Nov 2001 
Mu Tao Wang is a very good professor. He speaks English just fine, with just the slightest accent. He knows everything backwards and forwards, and is responsive to questions. There is nothing extraordinarily good or bad about him, he is simply a good professor and there is eminently capable of teaching any class you are taking well.